Upload
others
View
18
Download
0
Embed Size (px)
Citation preview
EPSON TERMINAL PRINTER
EPL-5500SERVICE MANUAL
EPSON4005431
- ii -
NOTICE
All rights reserved. Reproduction of any part of this manual in any form whatsoever without SEIKOEPSON’s express written permission is forbidden.
The contents of this manual are subjects to change without notice.
All efforts have been made to ensure the accuracy of the contents of this manual. However, shouldany errors be detected, SEIKO EPSON would greatly appreciate being informed of them.
The above notwithstanding SEIKO EPSON can assume no responsibility for any errors in thismanual or the consequence thereof.
Epson is a registered trademark of Seiko Epson Corporation.
General Notice: Other product names used herein are for identication purposes only and maybe trademarks of their respective campanies.
Copyright © 1995 by SEIKO EPSON CORPORATION Nagano, Japan
- i -
PRECAUTIONS
Precautionary notations throughout the text are categorized relative to 1) personal injury and 2)damage to equipment.
DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury.Great caution should be exercised in performing procedures preceded by DANGERHeadings.
WARNING Signals a precaution which, if ignored, could result in damage to equipment.
The precautionary measures itemized below should always be observed when performing repair/maintenance procedures.
DANGER
1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND PERI-PHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURE.
2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITHBASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS INTHEIR LINE OF WORK.
3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CONNECTTHE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN THE POWERSUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ONPOWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.
WARNING
1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTI-FIED REPAIR TECHNICIAN.
2. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLTAGE,LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS APRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT CON-NECT IT TO THE POWER SOURCE.
3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THEPOWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDSAND/OR INDIVIDUAL CHIPS.
4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATICDISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSINGINTERNAL COMPONENTS.
5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BY THEMANUFACTURE; INTRODUCTION OF SECOND-SOURCE ICs OR OTHER NONAPPROVEDCOMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON WAR-RANTY.
- ii -
SAFETY INFORMATION
This printer is a page printer which operates by means of a laser. There is no possibility of danger fromthe laser, provided the printer is operated according to the instructions in this manual provided.
Since radiation emitted by the laser is completely confined within protective housings, the laser beamcannot escape from the machine during any phase of user operation.
For United States Users;
[Laser Safety]
This printer is certified as a Class 1 Laser product under the U.S. Department of Healthand Human Services (DHHS) Radiation Performance Standard according to the Radia-tion Control for Health and Safety Act of 1968. This means that the printer does notproduce hazardous laser radiation.
[CDRH Regulations]
The Center for Devices and Radiological Health (CDRH) of the U.S. Food and DrugAdministration implemented regulations for laser products on August 2, 1976. Com-pliance is mandatory for products marketed in the United States. The label shown belowindicates compliance with the CDRH regulations and must be attached to laser productsmarketed in the United States.
WARNING : Use of controls, adjustments or performance of procedures otherthan those specified in this manual may result in hazardous radiation exposure.
[Internal Laser Radiation]
Maximum Radiation Power: 5.0 × 10-4 (W)Wave Length: 790 ± 20 nm
This is a Class IIIb Laser Diode Assay that has an invisible laser beam. The print headunit is NOT A FIELD SERVICE ITEM. Therefore, the print head unit should not be openedunder any circumstances.
For Other Countries Users;
WARNING: Use of controls, adjustments or performance of procedures otherthan those specified in this manual may result in hazardous radiation exposure.
This is a semiconductor laser. The maximum power of the laser diode is 5.0 ×10-4 W and the wavelength is 790 ± 20 nm.
For Denmark Users;
ADVARSELUsynlig laserstråling ved åbning, når sikkerhedsafbrydere er ude af funktion.Undgå udsættelse for stråling.
Klasse 1 laser produkt der opfylder IEC825 sikkerheds kravene.
- iii -
For Finland, Sweden Users;
VAROITUSLaitteen käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saat-taa altistaa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle laser-säteiylle.
VARNINGOm apparaten används på annat sätt än i denna bruksanvisning specificerats,kan användaren utsättas för osynlig laserstrålning, som överskrider gränsen förlaser klass 1.
For Finland, Sweden Service People
VAROITUSAvattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle laser-säteilylle. Älä katso säteeseen.
VARNINGOsynlig laserstrålning när denna del är öppnad och spärren är urkopplad.Betrakta ej strålen.
For Norway Users;
ADVARSELDersom apparatet brukes på annen måte enn spesifisert i denne bruksanvis-ning, kan brukeren utsettes for unsynlig laserstråling som overskrider grensenfor laser klasse 1.
Dette er en halvleder laser. Maksimal effeckt til laserdiode er 5.0 × 10-4 W og
bølgelengde er 790 ± 20 nm.
Laser Safety Labels
[Label on rear printer case]
A laser safety labels is attached on the outside of the printer shown below.
For United State
- iv -
For Europe
[Label inside printer]
The following laser safety label will be attached inside the printer as shown below.
For Denmark, Finland, Sweden, and Norway
- v -
PREFACE
This manual describes functions, theory of electrical and mechanical operations, maintenance, and repairof EPL-5500.The instructions and procedures included herein are intended for the experience repair technician, andattention should be given to the precautions on the preceding page. The chapters are organized asfollows:
CHAPTER 1. GENERAL DESCRIPTIONProvides a general product overview, lists specifications, and illustrates the main components of the printer.
CHAPTER 2. OPERATING PRINCIPLESDescribes the theory of printer operation.
CHAPTER 3. DISASSEMBLY AND ASSEMBLYIncludes a step-by-step guide for product disassembly and assembly.
CHAPTER 4. ADJUSTMENTSIncludes a step-by-step guide for adjustment.
CHAPTER 5. TROUBLESHOOTINGProvides Epson-approved techniques for adjustment.
CHAPTER 6. MAINTENANCEDescribes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment.
APPENDIXDescribes connector pin assignments, circuit diagrams, circuit board component layout and exploded diagram.
The contents of this manual are subject to change without notice.
- vi -
REVISION SHEET
Revision Issue Date Revision Page
Rev. A October 06, 1995 1st issue
Rev. B March 15, 1996
Revise the whole pages of thefollowing chapters:
Chapter 1Chapter 2Chapter 3Chapter 4Chapter 5Chapter 6
- vii -
Chapter 1 General Description
Table of Contents
1.1 FEATURES 1-1
1.2 SPECIFICATIONS 1-31.2.1 Basic Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31.2.2 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-51.2.3 Reliability Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-51.2.4 Environmental Conditions for Operating (Include Imaging Cartridge) . . . . 1-51.2.5 Environmental Conditions for Storage and Transportation . . . . . . . . . . . . 1-51.2.6 Applicable Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-61.2.7 Specifications for Consumable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-61.2.8 Physical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-61.2.9 Software Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1.3 INTERFACE SPECIFICATIONS 1-91.3.1 Parallel Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
1.3.1.1 Compatibility Mode of Parallel Interface . . . . . . . . . . . . . . . . . . . . 1-91.3.1.2 Reverse ModeMode Signal Timing . . . . . . . . . . . . . . . . . . . . . . . 1-11
1.3.2 Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-151.3.3 Optional LocalTalk Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
1.4 OPERATING INSTRUCTIONS 1-181.4.1 Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-181.4.2 Printer Settings Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-201.4.3 Service Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
1.4.3.1 Heaxadecimal Dump Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-231.4.3.2 EEPROM Initialize Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-231.4.3.3 Factory Reset Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-231.4.3.4 Default Setting Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
1.4.4 Display of Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-271.4.4.1 Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-271.4.4.2 Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-271.4.4.3 Service Call Error Message. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27
1.4.5 Printer Sharing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-281.4.5.1 Port Fixed Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-281.4.5.2 Auto Sense Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
1.4.6 Emulation Mode Switch Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-291.4.6.1 Emulation Switch by SPL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-291.4.6.2 Intelligent Emulation Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29
1.4.7 Bi Resolution Improvement Technology . . . . . . . . . . . . . . . . . . . . . . . . . 1-301.4.8 Toner Save Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-311.4.9 Optional Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31
1.5 MAIN COMPONENTS 1-321.5.1 C169 MAIN-B Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-331.5.2 PWB-E Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-341.5.3 PWB-F Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-341.5.4 Optical Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-351.5.5 FUSING UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-351.5.6 Photoconductor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36
1.5.7 Developing Cartridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-361.5.8 Lower Paper Cassette Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36
List of Figures
Figure 1-1. Exterior View of the EPL-5500 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Figure 1-2. Printable Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Figure 1-3. Compatibility Mode Signal Timing . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9Figure 1-4. Parallel Interface State Switch Diagram . . . . . . . . . . . . . . . . . . . . . 1-12Figure 1-5. Negotiation Timing Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13Figure 1-6. Timing Chart of Data Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13Figure 1-7. Termination Timing Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14Figure 1-8. Timing Chart of Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14Figure 1-9. Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18Figure 1-10. Port Fixed Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28Figure 1-11. Auto Sense Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28Figure 1-12. Emulation Switch by SPL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29Figure 1-13. Intelligent Emulation Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29Figure 1-14. Effect of RITech . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30Figure 1-15. RITech Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30Figure 1-16. Toner Save Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31Figure 1-17. Component Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32Figure 1-18. C169 MAIN-B Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33Figure 1-19. PWB-E Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34Figure 1-20. PWB-F Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34Figure 1-21. Optical Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35Figure 1-22. Fusing Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35Figure 1-23. Photoconductor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36Figure 1-24. Developing Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36
List of Tables
Table 1-1. Options for the EPL-5500. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2Table 1-2. Paper Feed Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Table 1-3. Paper Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Table 1-4. Usability of Special Papers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Table 1-5. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5Table 1-6. Differences between EPSON GL/2 and GL/2 in the HP LaserJet 4Emulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7Table 1-7. Built-in Fonts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7Table 1-8. Parallel Interface Pin Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10Table 1-9. Parallel Interface Pin Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11Table 1-10. Serial Interface Connector Pin Assignments . . . . . . . . . . . . . . . . . 1-15Table 1-11. LocalTalk Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . . 1-17Table 1-12. Printer Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20Table 1-13. Service MOde Select Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23Table 1-14. Default Settings Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24Table 1-15. Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27Table 1-16. Differences in Components for the C169 MAIN-B Board . . . . . . . 1-33
Rev. A 1-iii
1.1 FEATURES
The EPSON EPL-5500 is non-impact page printer that combines a semi-conductor laser withelectrophotographic technology. This printer is small and light, and features high-speed,high-resolution printing. Maintenance is very easy as a result of various built-in diagnostic functions.The main features are:
❏ No ozone
❏ Printing speed — 6 ppm (pages per minute)
❏ Resolution — 600/300 dpi (dots per inch)
❏ Light weight — about 5 kg (11 lb)
❏ Small footprint
❏ Low running cost: separation of the development/toner cartridge and photoconductor unit
❏ HP LaserJet 4 emulation mode
❏ 22 built-in scalable fonts (8 Agfa and 14 TrueType fonts)
❏ High-performance controller (the controller’s CPU is a 22.5 MHz SPARKlite (MB86933H))
❏ Bi Resolution Improvement Technology (BiRITech) refines the print quality by eliminatingjagged edges from images and characters on 600 dpi and 300 dpi printing
❏ Memory Improvement Technology supported
❏ Optional EPSONScript Level 2 (PostScript compatible) module
❏ Optional WPS (Windows Printing System) ROM SIMM module
❏ Optional I239X, ESC/P 2 , and FX emulation ROM SIMM module
❏ EPSON Micro Gray Technology (EMGTech), which is available when using PCL andEPSONScript Level 2 mode, refines gray scale printing to be comparable to printing on a1200-dpi printer
❏ Small and low-cost optional LocalTalk with serial interface module
❏ 1MB standard RAM and memory expansion available up to 32MB of RAM with the addition ofoptional SIMMs
❏ Bidirectional parallel interface
❏ Toner-saver mode supported
❏ A multi-user, multi-emulation mode
❏ IES (Intelligent Emulation Switch) allows switching between EPSONScript mode and anothermode
❏ SPL (Shared Printer Language) enables switching of the printer mode by command
Figure 1-1 shows an exterior view of the EPL-5500.
Figure 1-1. Exterior View of the EPL-5500
EPL-5500 Service Manual General Description
Rev. B 1-1
Table 1-1 lists the optional units available for the EPL-5500.
Table 1-1. Options for the EPL-5500
Cat. No. Description Note
C83218✽ Windows Printing System ROM SIMM Supports Windows Printing System
C83219✽EPSONScript Level 2 ROM SIMM Supports EPSONScript Level 2 mode
(PostScript Level 2 compatible) fonts andcommands (see Note 1)
C83220✽LQ/FX/I239X ROM SIMM Supports ESC/P 2, FX, and IBM
2390/2391 emulation modes
—NLSP Bitmap 2 font ROM Supports local NLSP bitmap fonts
(see Note 2)
—NLSP Scalable font ROM Supports local NLSP scalable fonts
(see Note 2)
C812491250-sheet lower paper cassette for theEPL-5500 (A4/B5)
Lower paper cassette
S050005 Developer cartridge Developer and toner cartridge
S051029 Photoconductor unit —
C82334✽ LocalTalk with serial I/F module (see Note 3)
C83614✽ Interface cable RS-232C extension cable for C82334✽
C82335✽ Type-B EX box Type-B I/F card box (see Note 4)
C82307✽/C82308✽
32 KB serial interface card (see Note 5)
C82310✽/C82311✽
32 KB parallel interface card (see Note 5)
C82312✽ LocalTalk card (see Note 5)
C82313✽ GPIB card (see Note 5)
C82314✽ COAX interface card (see Note 5)
C82315✽ TWINAX interface card (see Note 5)
C82324✽ Ethernet interface card for NetWare (see Note 5)
C82328✽ FAX card (see Note 5)
C82331✽ Multi protocol Ethernet card (see Note 5)
Notes:
1. Requires added memory (RAM) over a total of 2 MB, including standard RAM.
2. NLSP font ROMs do not support ESC/P 2 and FX modes.
3. LocalTalk with serial I/F module (C82334✽) cannot be used with Type-B EX box (C82335✽).
4. Type-B EX box (C82335✽) cannot be used with LocalTalk with serial I/F module (C82334✽) .
5. Type-B EX box (C82335✽) must be installed while using the Type-B I/F card.
General Description EPL-5500 Service Manual
1-2 Rev. B
1.2 SPECIFICATIONS
This section provides statistical data for the EPL-5500.
1.2.1 Basic Specifications
Printing method: Laser beam scanning and dry electrophotography
Resolution: 600/300 dpi
Printing speed: 6 ppm (letter/A4)
First printing time (A4/LT): Less than 20 seconds (face-up output)
Warm-up time: Less than 35 seconds (at rated current and 23° C (73° F) temperature)
Paper supply: See Table 1-2.
Table 1-2. Paper Feed Methods
Paper SupplyCapacity Using20 lb. (75 g/m 2)
PaperPaper Size
Usage Thickness(Ream Weight)
Standard built-in paper tray 150 A5, B5, A4, LT,GLT, EXE, LGL,GLG, F4, HL
16 to 24 lb.(60 to 90 g/m2)
5 to 10 Monarch, DL, C5, C6, International B5,Commercial-10
Envelopes madeof 20 to 24 lb. (75 to 90 g/m2)paper
Manual feed slot 1 Any size feedable(Note 2)
16 to 42 lb.(60 to 157 g/m2)
Lower paper cassette (optional) 250 A4, B5 16 to 24 lb.(60 to 90 g/m2)
Notes:
1. The weight in pounds (lb) is determined by the weight of 500 sheets cut to 17 × 22 inches; 1 g/m2 = 0.2659763 lb.
2. Paper size range: width 3 to 8.5 inches (76 to 216 mm) length 5 to 14.0 inches (127 to 356 mm)
Paper types: See Table 1-3.
Table 1-3. Paper Types
EPL-5500 Service Manual General Description
Rev. B 1-3
Standard paper Xerox 4024 DP paper20 lb (75 g/m2)
Normal paper Regular photocopier paperBond paperRecycled paper16 to 24 lb (60 to 90 g/m2)
Special papers Card stock (90 to 157 g/m2)EnvelopesLabelsLetterheadTransparency (OHP) sheetsColored paper
Printable Area
4.0 mm
4.0 mm
4.0 mm4.0 mm
Figure 1-2. Printable Area
General Description EPL-5500 Service Manual
1-4 Rev. B
Usability of special papers: See Table 1-4.
Table 1-4. Usability of Special Papers
Input OHP Envelopes Labels Card Stock Letterhead
Standard built-in paper tray
P P P P R
Manual feed slot P P P P R
Lower paper cassette N N N N P
R: Reliable feeding and good image quality.P: Possible, but better avoided.N: Not supported.
Paper feed alignment and direction: Center alignment for all sizes
Paper ejection: Face down
Output tray capacity: 100 sheets (face down)
Printable area (standard paper): See Figure 1-2.
Note: The actual printable area depends on the printer mode.
Noise: Less than 35 dB(A), standbyLess than 47 dB(A), operating
Ozone density: Less than 0.01 ppm
Toxicity: No toxicity exists in organic photoconductor (OPC), toner,or plastic materials
EPL-5500 Service Manual General Description
Rev. B 1-5
1.2.2 Electrical Specifications
Table 1-5. Electrical Requirements and Ranges
Description 100 V Version 200 V Version
Rated voltage 100 ∼ 120 VAC 220 ∼ 240 VAC
Input voltage range 90 ∼ 132 VAC 198 ∼ 264 VAC
Rated frequency range 50 ∼ 60 Hz
Input frequency range 47 ∼ 63 Hz
Power consumption Less than 500 W Less than 600 W
Power consumption while instandby mode
Less than 15 W(without option)
1.2.3 Reliability Specifications
MPBF (Mean Prints Between Failures): Over 25,000 sheets
Note: MPBF indicates average number of pages printed before occurrence of problem requiringreplacement or service.
MTBF (Mean Time Between Failures): 3000 power on hours (POH)Jam rate: 1 out of 2,000 sheets or less (excluding multiple-sheet feeding)Feed failure: 1 out of 2,000 sheets or less (excluding multiple-sheet feeding)Multiple paper feeds: 1 out of 500 sheets or lessPaper curl height: 30 mm (1.2 inches) or lessLeading edge bending (1 cm or more): 1 out of 1,000 sheetsMTTR (Mean Time To Repair): 30 minutes or lessDurability: 5 years or 180,000 sheets
1.2.4 Environmental Conditions for Operation (Including Imaging Cartridge)
Temperature: 10 to 35° C (50 to 95° F)
Humidity: 15 to 85% RH
Altitude: 2,500 m (8,200 feet) or lower
Levelness: 1°
Illuminance: 3,000 lux or less (Must not be exposed to direct sunlight.)
Surrounding space: Printer should have at least 100 mm of clearance on itssides and rear.
1.2.5 Environmental Conditions for Storage and Transportation
Temperature: 0 to 35° C (32 to 95° F)
Humidity: 30 to 85% RH
Drop test: Clear to JIS Z0200-1987 Level 1
Vibration: Vibration frequency 5 to 100 Hz and 100 to 5 HzAcceleration 1 GAcceleration direction 3 direction
Resistance to atmospheric pressure: More than 61.3 KPa
Storage life: 18 months (following date of manufacture)
General Description EPL-5500 Service Manual
1-6 Rev. B
1.2.6 Applicable Standards
Safety Standards
120 VAC model: UL 1950, CSA 22.2 No. 950 Deviation 3220/240 VAC model: EN 60950 (IEC950), NEMKO (IEC950), SETI (IEC950),
SEMKO (IEC950), DEMKO (IEC950)
Safety Regulations (Laser Radiation)
120 VAC model: FDA (NCDRH) Class 1220/240 VAC model: VDE 0837 (Laser Class 1) (IEC825), SETI (IEC825), SEMKO
(IEC825), DEMKO (IEC825)
EMI
120 VAC model: FCC Part 15 Subpart B Class B, DOC Class B220/240 VAC model: Vfg 243 (VDE 0878 Part 3,30)
EN55022 Class B (CISPR Pub.22 Class B)CE marking, EMC
Others
Toner: No effect on human health (OSHA-TSCA, EINECS)OPC: No effect on human health (OSHA)Ozone: Less than 0.01 mmp
other UL478 (5th edition)Materials: SWISS environmental law (must contain no CdS)
1.2.7 Specifications for Consumables
Life: Developer and toner cartridge: 3,000 pagesPhotoconductor unit: 20,000 pages
Note: In continuous printing mode with A4/letter paper at a 5% image ratio (black/white ratio).The life varies, depending on the printing mode (continuous or intermittent) and/or theimage ratio.
Environmental Conditions for Storage and Transportation
Temperature: 0 to 35° C (32 to 95° F)
Humidity: 30 to 85% RH
Drop test: Height 76 cm (30.4 inches)Vibration: Same as printerResistance to atmospheric pressure: More than 74 KpaStorage term: 18 months (following date of manufacture)
1.2.8 Physical Specifications
Dimensions (Width × Depth × Height):
Printer: 352 × 264 × 299 mm (13.9 × 10.4 × 11.8 inches)Weight: Approx. 5 kg (11 lb), with consumables, excluding all options
EPL-5500 Service Manual General Description
Rev. B 1-7
1.2.9 Software SpecificationsBuilt-in modes: HP LaserJet 4 emulation (PCL 5e)
EPSON GL/2 mode (GL-like mode)Note: EPSON GL/2 mode is similar to the GL/2 mode included in the HP LaserJet 4 emulation.
Table 1-6 shows the differences between EPSON GL/2 mode and the LJ4 GL/2 mode.While in EPSON GL/2 mode, the operator can enter GL/2 mode without sending theESC %#B (Enter GL/2 mode) command. If the operator’s application software cannotsend the ESC %#B command, then use this mode.
Table 1-6. Differences between EPSON GL/2 and GL/2 in the HP LaserJet 4 Emulation
EPSON GL/2 Mode GL/2 for HP LaserJet 4Emulation Mode
PCL mode Not available Initial modePaper eject Supports PG, AF commands Supported in PCLAuto eject SelecType setting Not availableReduced printing SelecType setting Available in PCLSwitch to PCL (ESC %#A)
Not supported Supported
Reset (ESC E) Ejects paper and then initializes Ejects paper, switches to PCL,and then initializes
PJL, EJL, and ES Supported SupportedAdvance full page (PG, AF)
Supported Not supported
Note: The EPL-5500 GL/2 mode features all the commands of the LJ4-GL/2 mode, plus a fewadditional commands. The GL/2 mode emulates some of the HP-GL plotter (HP 7475A,etc.) commands. If the application software uses unsupported commands for the GL/2mode, print cannot be assured.
Optional modes: EPSONScript Level 2 (PostScript Level 2 emulation) modeFX (FX-870/1170, LX-100) emulation modeESC/P 2 (Stylus 800/1000) emulation modeWPS (Windows Printing System) mode
Auxiliary software: Hex dumpStatus sheetFont sample
Built-in fonts: See Table 1-7. Table 1-7. Built-in Fonts
Resident Fonts Applicable ModeHP LJ4, GL/2
Bitmap fontsLine Printer16.66 cpi(Portrait) SScalable fontsDutch 801Roman SWC SDutch 801Bold SWC SDutch 801Italic SWC SDutch 801Bold Italic SWC SSwiss 742SWC SSwiss 742Bold SWC SSwiss 742Medium Italic SWC S
S: Supported, NS: Not Supported
EPL-5500 Service Manual General Description
Rev. B 1-7
Table 1-7. Built-in Fonts (Continued)
Resident FontsApplicable Mode
HP LJ4GL/2
Scalable fontsSwiss 742Bold Italic SWC SSwiss 721Roman SWM SSwiss 721Bold SWM SSwiss 721Oblique SWM SSwiss 721Bold Oblique SWM SDutch 801Roman SWM SDutch 801Bold SWM SDutch 801Italic SWM SDutch 801Bold Italic SWM SSymbol SetSWA SMore WingBatsSWM SCourierSWC SCourierBold SWC SCourierItalic SWC SCourierBold Italic SWC S
S: Supported, NS: Not Supported
General Description EPL-5500 Service Manual
1-8 Rev. B
1.3 INTERFACE SPECIFICATIONS
The EPL-5500 is equipped with the following external interfaces:❏ Parallel interface❏ Optional LocalTalk/serial interface❏ Optional Type B interface with Type-B EX box
1.3.1 Parallel InterfaceThe parallel interface has the following two modes:
❏ Compatibility mode (same as parallel interface for EPSON’s current page printer)❏ Reverse mode
1.3.1.1 Parallel Interface Compatibility ModeSystem: STROBE synchronization, 8-bit parallel data transferHandshaking: BUSY and ACKNLG signalsConnector type: P90-25027-1 (Amphenol) receptacleApplicable plug: 57-30360 (Amphenol or equivalent)Transfer speed: Approximately 400,000 bytes/second (max.)Signal timing: See Figure 1-3.Signal description: See Table 1-8.
DATA 1-8
STROBE
BU SY
ACKNLG
VALID VALID
0.5 µ s(minimum)
0.5 µ s(minimum)
0.5 µ s (minimum)
0.5 µ s (maximum)
1 or 10 µ s(typical)
0 s(min.)0.5 or 5 µ s
(minimum)
Figure 1-3. Compatibility Mode Signal Timing
EPL-5500 Service Manual General Description
Rev. B 1-9
Table 1-8. Parallel Interface Pin AssignmentsPin No. Signal Name I/O Description
1
STROBE
IN
STROBE is a strobe pulse used to read data from the hostcomputer. The pulse width must be more than 0.5 µsec.Normally it is HIGH, and data is latched at the trailing edge ofthis signal.
2-9
DATA 1-8
IN
DATA 1 to 8 are parallel data bits. When the signal is HIGH, thedata bit is 1, and when it is LOW, the data bit is 0. The mostsignificant bit (MSB) is DATA 8. The signal state must bemaintained for 0.5 µsec. on either side of the STROBE signalactive edge.
10
ACKNLG
OUT
ACKNLG is an acknowledge pulse with an approximate widthof 1 or 10 µsec. This signal goes LOW when the data reception iscompleted, which indicates that the printer can accept new data.Timing with the BUSY signal is specified through SelecType.
11 BUSY OUT The BUSY signal informs the host computer of the printer state.When the signal is HIGH, the printer cannot accept data.
12PE
OUTThe PE signal indicates paper empty for the standard trayselected through SelecType or command, or for the optionalpaper cassette. Paper empty is indicated by HIGH.
13 SLCT OUT Used in reverse mode.
14 AUTO-FEED IN Not used.
15 NC — Not used.
16 GND — Logic ground level.
17 CHASSIS GND — Connected to the printer chassis. The printer chassis GND andthe signal GND are connected to each other.
18 NC — Not connected.
19-30 GND — Ground level for the twisted pair return signal.
31 INIT IN The STROBE signal is ignored when this signal is LOW.
32
ERROR
OUT
This level goes LOW when the printer is:• Out of paper• Paper jam• In the error state• Off line
33 GND — Same as for pins 19 to 30.
34 NC — Not used.
35 +5 — Pulled up to +5 V through 1.0K-ohm resistance.
36 SLCT IN — Used in reverse mode.
General Description EPL-5500 Service Manual
1-10 Rev. B
1.3.1.2 Reverse ModeReverse mode for the EPL-5500 supports the IEEE-P1284 nibble mode. This printer can run inreverse mode, in which the printer can inform the computer of its status with EJL and PJLcommands.System: IEEE-P1284 nibble modeConnector type: P90-25027-1 (Amphenol) receptacleApplicable plug: 57-30360 (Amphenol or equivalent)Signal description: See Table 1-9.
Table 1-9. Parallel Interface Pin AssignmentPin No. Signal Name I/O Description
1 STROBE IN HostClk: This signal is a strobe pulse used to read extensionrequest values from the host computer during negotiation.
2-9
DATA 1-8
IN
These signals are data bits of extension request values receivedduring negotiation. This printer supports following values:0000 0100: Request Device ID (sent in nibble mode)0000 0000: Request nibble mode
10 ACKNLG OUT PtrClk: Printer sends clock data.
11 BUSY OUT PtrBusy: Printer sends data bits 3 and 7 during data transfer tohost computer.
12PE
OUT AckDataReq: Printer sends data bits 2 and 6 during datatransfer to host computer.
13 SLCT OUT Xflag: Printer sends data bits 2 and 6 during data transfer tohost computer.
14AUTO-FEED
INHostBusy: This signal informs the printer of the host computer’sstate. When the signal is HIGH, the host computer cannotaccept data.
15 NC — Not used.
16 GND — Logic ground level.
17 CHASSIS GND — Connected to the printer chassis. The printer chassis GND andthe signal GND are connected to each other.
18 NC — Not connected.
19-30 GND — Ground level for the twisted pair return signal.
31 INIT IN nInit: Fixed at HIGH level.
32 ERROR OUT nDataAvail: Printer sending data bits 0 and 4 during datatransfer to host computer.
33 GND — Same as for pins 19 to 30.
34 NC — Not used.
35 +5 — Pulled up to +5 V through 1.0K-ohm resistance.
36 SLCT IN IN 1284Active: If this signal is set to HIGH, this printer is activelyin P1284 (reverse mode).
EPL-5500 Service Manual General Description
Rev. B 1-11
Figure 1-4 shows the switch diagram for the parallel interface state.
ForwardD ataTransfer
ForwardIdle
STROBE
ACK and BUSY
Compatibi l i ty Mode
Terminate
Negotiat ion
SLCT IN=HIGHFai ledNegotiat ion
ReverseDataTransfer
Host BusyDataAvailable
Host BusyData NotAvailable
ERR=HIGH
No data sent
ERR=LOW
Sending data
E RR=LOW
Sending data
ERR=HIGHAUTOFEED=LOW
No data sent Request tosend data
ReverseIdle
InterruptHo st
SLCT IN=LOW
ERR=LOW
AUTOFEED=LOW AUTO
FEED=HIGH
Figure 1-4. Parallel Interface State Switch Diagram
General Description EPL-5500 Service Manual
1-12 Rev. B
Figure 1-5 shows the negotiation timing chart.
Notes:1. This signal is set to HIGH when no data is being sent.
This signal is set to LOW during sending of data.2. This signal is set to HIGH if the extension request value was 04h.3. HB DA: Host Busy Data is Available
HB DNA: Host Busy Data is Not Available Figure 1-6 shows the data transfer timing chart.Notes:
1. This signal is set to HIGH when no data is being sent.This signal is set to LOW during sending of data.
2. This signal is set to HIGH, if extension request value was 04h.3. HB DA: Host Busy Data is Available
HB DNA: Host Busy Data is Not Available
DATA 00h or 04h
SEL-IN
STROBE
AUTO-FEED
ACKNLG
Peripheral Busy StatusBUSY
Current Peripheral StatusPE Note1
Note 2SLCT
Current Peripheral StatusERROR Note1
Compatibility Negotiation HB DA orHB DNA(Note 3)
Idle orTransfer
Figure 1-5. Negotiation Timing Chart
DATA
SEL-IN
STROBE
AUTO-FEED
ACKNLG
Peripheral Busy StatusBUSY
PE
SLCT
ERROR
HB DA Negotiation
HB DA orHB DNA(Note 3)
Idle orTransfer
Bit 3 Bit 7
Bit 2 Bit 6
Bit 1 Bit 5
Bit 0 Bit 4
Peripheral Busy Status
Note 1
Note 1
Note 2
Figure 1-6. Timing Chart for Data Transfer
EPL-5500 Service Manual General Description
Rev. B 1-13
Figure 1-7 shows the timing chart for termination.
Notes:
1. The signal is HIGH when HB DNA.The signal is LOW when HB DA.
2. The signal is set to HIGH, if the extension request value was 04h.3. Idle = LOW.Figure 1-8 shows the timing chart for interrupts.
Note: The signal is set to HIGH, if the extension request value was 04h.
DATA
SEL-IN
STROBE
AUTO-FEED
ACKNLG
Peripheral Busy StatusBUSY
PE
SLCT
ERROR
HB DNA, Idle,or HB DA
Termination Compatibility
Peripheral Busy Status
Note 1
Note 2
Note 3
Current Peripheral Status
Current Peripheral StatusNote 1
Figure 1-7. Termination Timing Chart
DATA
SEL-IN
STROBE
AUTO-FEED
ACKNLG
Peripheral Busy StatusBUSY
PE
SLCT
ERROR
Reverse Idle Interrupt
Note 1
HB DA Transfer
Figure 1-8. Timing Chart for Interrupts
General Description EPL-5500 Service Manual
1-14 Rev. B
1.3.2 Serial InterfaceThis printer can use the optional LocalTalk/serial interface module.Type: RS-232C/current loopTransfer system: Full duplexSynchronization: Asynchronous start-stop system
Start-bit: 1 bitStop-bit: 1 or 2 bitsData length: 7 bits or 8 bitsParity: Odd, even, or none
Protocol: X-ON/X-OFF (can be combined with DTR control)DTR control (can be combined with X-ON/X-OFF)
Transfer speed: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, or 57600 bpsError: Overrun error: Processed as missing data and replaced by “*”
Parity error: Replaced by “*”Framing error: Replaced by “*”Breaking character: Ignored
Signal description: See Table 1-10. Table 1-10. Serial Interface Pin Assignments
Pin No. Signal Name I/O Description
1CHASSIS-GND
— Connected to the printer chassis. The printer chassis GND andsignal GND are connected to each other.
2
TXD
OUT
Serial ASCII data output by the printer. It maintains the“MARK” state (LOW level) between transmitted charactercodes. Logic 0 is at HIGH level (SPACE) and logic 1 is at LOWlevel (MARK).
3 RXD IN Serial ASCII data input to the printer. It maintains “MARK”state (LOW level) between received character codes.
5 CTS IN Always ignored.
7 SIGNAL-GND — Ground.
17
TTY-TXD
OUT
Current loop signal: HIGH impedance (SPACE) between pins17 and 24 or X-ON signal sent across pins 17 and 24 indicatesthat the printer is ready to accept data; LOW impedance(MARK) or X-OFF signal being sent indicates that the printer isbusy.
20
DTR
OUT
Signal output by printer. When the DTR signal is HIGH, theprinter can receive the RXD signal. The SelecType settings donot specify DTR control, the signal level is HIGH while printerpower is on. When the SelecType setting is used for DTRcontrol, DTR goes LOW in case of any error conditions. Thedata (RXD) from host computer must be stopped within 128characters after DTR goes LOW.
23 TTY-RXD Return — Current loop signal: Current return for pin 17
24 TTY-TXD Return — Current loop signal: Input data current loop
25 TTY-RXD IN Current loop signal: Current return for pin 25
Note : The DTR state can be selected through printer settings.
EPL-5500 Service Manual General Description
Rev. B 1-15
Handshaking
When the vacant area for data in the input buffer drops to 256 bytes, the printer outputs an X-OFFcode or sets the DTR signal level to LOW, indicating that the printer cannot receive more data.Once the vacant area for data in the buffer recovers to 512 bytes, the printer outputs an X-ON codeor sets the DTR flag to HIGH, indicating that the printer is again ready to receive data.
Protocol
There are two types of protocols, as listed below, and each of them can be designated by SelecTypeindependently.❏ DTR/DSR protocolSelecType is used to execute the DTR/DSR control protocol. The DTR signal is set to HIGH whenthe printer is ready to receive data, and to LOW when conditions indicate an error or that thereceiving buffer is full.When the error is cleared and the printer returns to on-line mode, the signal returns to HIGH. WhenSelecType is used to set the DTR control OFF, DTR is always set to HIGH. The printer transmitsTXD only when DSR is at the HIGH level (DSR is always considered HIGH when the SelecTypesetting for DSR is OFF). X-ON/X-OFF transmission is independent of the DSR state.❏ X-ON/X-OFF (DC1/DC3) protocolSelecType is used to execute the X-ON/X-OFF protocol. The X-OFF (DC3) code is output if statusindicates an error, and the printer warns the host to stop data transmission within 256 characters.No further X-OFF codes are sent in response to additional data received from the host after theX-OFF code has been sent once. The X-ON (DC1) code is output after all conditions given in theerror are cleared.When the remaining capacity of the receive buffer reaches 512 characters, X-OFF (DC3) is outputonce. It is sent only once, even if there are multiple errors. The printer goes on line automatically atpower on, and outputs an X-ON code. Transmission of X-ON/X-OFF codes can be defined bySelecType.
General Description EPL-5500 Service Manual
1-16 Rev. B
1.3.3 Optional LocalTalk InterfaceThis printer can use the optional LocalTalk/ serial interface module.Type: LocalTalkSignal level: Same as RS-422 signal levelProtocol: X-ON/X-OFF (cannot be combined with DTR control)
DTR control (cannot be combined with X-ON/X-OFF)Transfer speed: 230.4K bpsSignal description: See Table 1-11.
Table 1-11. LocalTalk Interface Pin AssignmentsPin No. Signal Name I/O Description
1 DTR OUT Signal output by the printer. When the DTR signal is HIGH, theprinter can receive the RXD signal.
2 CTS IN The printer transmits the data through TXD while CTS is HIGH.
3
TXD-
OUT
Serial ASCII data output from the printer.HIGH level; when SD+ voltage is higher than the SD- voltage.LOW level; when SD+ voltage is less than the SD- voltage.Logic 0 is SPACE and logic 1 is MARK. The state must bemaintained between transmitted character codes.
4 GND — Ground.
5
RXD-
IN
Serial ASCII data input from computer.HIGH level; when RD+ voltage is higher than RD- voltage.LOW level; when RD+ voltage is less than RD- voltage.Logic 0 is “SPACE” and logic 1 is “MARK” state must bemaintained between transmitted character codes.
6 TXD+ OUT Refer to TXD-.
7 NC — No connect.
8 RXD+ IN Refer to RXD-.
EPL-5500 Service Manual General Description
Rev. B 1-17
1.4 OPERATING INSTRUCTIONS
This section describes functions performed through the control panel, such as printing a statussheet, hexadecimal dump, and printer settings functions.
1.4.1 Control PanelThe printer control panel gives you easy control over most common printer operations. The panelconsists of indicator lights and a button.
Indicator lights
❏ Yellow lightON: Communication with the host is possible.Fast flashing: Receiving data or warming up.Slow flashing: Received data is stored in the printer but has not been printed.OFF: Printer is power off.❏ Red lightON: Paper jam or cover open.Fast flashing: Feed jam, paper empty.Slow flashing: One of these errors: SOFT ERROR, PRINT OVERRUN, MEMORY OVERFLOW,
CHECK PAPER SIZE, IMAGE OPTIMUMOFF: No error condition.
LED (Yellow)
LED (Red)
Button
Figure 1-9. Control Panel
General Description EPL-5500 Service Manual
1-18 Rev. B
Functions of Pressing the Button
❏ While the Red light flashes slowly:Function of button Clears an error.Operation Hold down the button until the yellow and Red lights both go on
after release. The printer prints a status sheet indicating the errortype.
❏ While the Red light flashes fast:Function of button Prints any of the following page.
- Feed jam or paper empty page- Manual feed page
Operation Load the paper or clear the jam, and then hold down the buttonuntil the yellow and Red lights go on, then release to continueprinting.
❏ While yellow light is flashing slowly (except in EPSONScript mode):Function of button Prints out data in the printer’s memory.Operation Hold down the button until the yellow and red lights go on, then
release the button to continue printing.❏ While the yellow light is on (except in WPS mode):Function of button Prints a status sheet.Operation Hold down the button until the yellow and red lights go on, then
release the button to continue printing. The yellow light flash whilethe status sheet is being printed.
❏ Reset (always effective except during warm up or status sheet printing):Function of button Clears current port.Operation Hold down the button until the yellow and red lights go on, and
when these lights start flashing alternately, release the button.❏ Warm boot (always effective except during warm up or status sheet printing):Function of button Warm boot (same as power on reset, except for engine initialization).Operation Hold down the button until the yellow and red lights start flashing
at the same time, then release the button.
EPL-5500 Service Manual General Description
Rev. B 1-19
1.4.2 Printer Settings FunctionsThe printer settings function from the Remote Control Panel (software) lets the user control most ofthe printer’s functions, such as printing test pages, selecting a paper size, and changing the printer’sconfiguration. Table 1-12 shows the printer settings options.
Table 1-12. Printer Settings
Menu Item Available Options
PRINTING COPIES 1 to 999
PAGE SIZE A4, A5, B5, LT, HLT, LGL, GLT, GLG, EXE,F4, MON, C10, DL, C5, IB5, CTM
ORIENTATION PORT, LAND
MANUAL FEED OFF, ON
RITech OFF, LIGHT, MEDIUM, DARK
TONER SAVE OFF, ON
LJ4 FONT SRC RESIDENT, SIMM, DOWNLOAD
FONT NUMBER 0 to (available)
PITCH 0.44 to 99.99 CPI (0.01 steps)
HEIGHT 4.00 to 999.75 PT. (0.25 steps)
SYMSET Roman-8, ECM94-1, 8859-2 ISO, 8859-2 ISO,IBM-US, IBM-DN, PcMultiling, PcE.Europe,PcTk437, WiAnsi, WiE.Europe, WiTurkish,DeskTop, PsText, VeInternati, VeUS,MsPublishin, Math-8, PsMath, VeMath,PiFont, Legal, UK, ANSI ASCII, Swedis2,Italian, Spanish, German, Norweg1,French2, Windows
FORM 5 to 128 lines
SRC SYMSET* 0 to 3199
DEST SYMSET* 0 to 3199
PS* ERR SHEET OFF, ON
MicroGray OFF, ON
PROTECT LEVEL 1 to 5
ESCP2* Font Courier, Roman, Sans serif, Roman-T,Sans-H, Script
Pitch 10 CPI, 12 CPI, 15 CPI, Prop
Condensed OFF, ON
T-Margin 0.40 to 1.50 Inch (0.05 steps)
Text 1 to (available) lines
CG Table Pc USA, Italic, PcMultilin, PcPortuguese,PcCanFrenc, PcNordic, PcTurk2,Pc.E.Europe, BpBRASCII, BpAbicomp
Country USA, France, Germany, UK, Denmak,Sweden, Italy, Spain1, Japan, Norway,Denmark2, Spain2, LatinAmeric, Korea,Legal
* With optionTable 1-12. Printer Settings (Continued)
Menu Item Available Options
General Description EPL-5500 Service Manual
1-20 Rev. B
ESCP2 * (Continued) Auto CR ON, OFF
Auto LF OFF, ON
Bit Image Dark, Light, BarCode
Zero Char 0, φFX* Font Courier, Prestige, Roman, Sans serif, Script
Pitch 10 CPI, 12 CPI, 15 CPI, Prop
Condensed OFF, ON
T-Margin 0.40 to 1.50 Inch (0.05 steps)
Text 1 to (available) lines
CG Table Pc USA, Italic, PcMultilin, PcPortuguese,PcCanFrenc, PcNordic, PcTurk2,Pc.E.Europe, BpBRASCII, BpAbicomp
Country USA, France, Germany, UK, Denmak,Sweden, Italy, Spain1, Japan, Norway,Denmark2, Spain2, LatinAmerica
Auto CR ON, OFF
Auto LF OFF, ON
Bit Image Dark, Light, BarCode
Zero Char 0, φI239X* Font Courier, Prestige, Gothic, Orator Script,
Presentor
Pitch 10 CPI, 12 CPI, 15 CPI, 17 CPI, 20 CPI, 24CPI, Prop
Code Page 437, 850, 860, 863, 865
T-Margin 0.40 to 1.50 Inch (0.05 steps)
Text 1 to (available) lines
Auto CR OFF, ON
Auto LF OFF, ON
Alt.Graphics OFF, ON
Bit Image Dark, Light, BarCode
Zero Char 0, φ* With option
EPL-5500 Service Manual General Description
Rev. B 1-21
Table 1-12. Printer Settings (Continued)
Menu Item Available Options
JOB PAGE PROTECT AUTO, ON
RESOLUTION 600, 300
IMAGE OPTIMUM AUTO, OFF, ON
TIMEOUT 5 to 300
EMULATION PARALLEL LJ4, ESCP2*, FX*, I239X*, PS*, GL2, AUTO*
SERIAL* LJ4, ESCP2*, FX*, I239X*, PS*, GL2, AUTO*
L/T* LJ4, ESCP2*, FX*, I239X*, PS*, GL2, AUTO*
AUX* LJ4, ESCP2*, FX*, I239X*, PS*, GL2, AUTO*
CONFIG AUTO CONT OFF, ON
STANDBY ENABLE, DISABLE
DENSITY 3, 4, 5, 1, 2
INTERFACE AUTO, PARALLEL, SERIAL*, L/T*, AUX*
TOP OFFSET 0 to 99
LEFT OFFSET 0 to 99
PAGE COUNT 0 to 262143
PARALLEL SPEED FAST, LOW
BI-D ON, OFF
SERIAL WORD LENGTH 8, 7
BAUD RATE 9600, 19200, 38400, 57600, 300, 600, 1200,2400, 4800
PARITY NONE, EVEN, ODD
STOP BIT 1, 2
DTR ON, OFF
XON/XOFF ON, OFF
TEST STATUS SHEET —
PS STATUS SHEET* —
PS FONT SAMPLE* —
PS FACT SHEET* —
EXT PRINTER INFO —
* With option
General Description EPL-5500 Service Manual
1-22 Rev. B
1.4.3 Service ModeThis printer has the following four service modes:❏ Hexadecimal dump mode❏ EEPROM format mode❏ Factory reset mode❏ Default setting modeEach service mode can be activatted selectively, by turning the printer on while hold down thebutton and release it at the corresponding timing shown in table below.
Table 1-13. Service Mode Select Timing
Order Pattern LED(Yellow)
LED(Red) Mode
1 Pattern 0-0 ON ON NA
2 Pattern 0-1 OFF OFF NA
3 Pattern 1 ON OFF Hexadecimal dump mode
4 Pattern 2 OFF ON EEPROM Initialize mode
5 Pattern 3 ON OFF Factory reset mode
6 Pattern 4 OFF OFF Default setting mode *1
*1: Can be performed by the user.
1.4.3.1 Hexadecimal Dump ModeHexadecimal dump mode is a useful tool in troubleshooting data control problems. To enterhexadecimal dump mode, release the button at the mode select timing "Pattern-1". To quit thehexadecimal dump mode, turn off the printer or perform the warm-boot operation.
1.4.3.2 EEPROM Initialize ModeEEPROM initialize operations are required only when the main board or EEPROM is replaced andthese operations are specified in the accompanying documentation.This mode resets all user settings to the factory default settings and clears the printer statusinformation (page counter and jam counter). To perform EEPROM initialize mode, release thebutton at the mode select timing "Pattern-2" and press the bottun again within 2 seconds from therelease. The LED lights flashes alternately during the initialization. If the button is not pressedwithin 2 seconds after release, the printer enters nomal state without initialize operation.
1.4.3.3 Factory Reset ModeThe factory reset mode resets the printer settings to the factory default settings (the page counterand jam counter are not cleared). To enter factory reset mode, release the button at the mode selecttiming "Pattern-3" and press the button again within 2 seconds after release. The LED lights flashesalternately during the reset operation. If the button is not pressed within 2 seconds after release, theprinter enters the nomal state without reset operation.
EPL-5500 Service Manual General Description
Rev. B 1-23
1.4.3.4 Default Settings
The default settings function is used to enter printer settings. The procedure for entering defaultsettings is:1. To enter the default settings mode, turn on the printer while holding down the button until
yellow and red lights turn off and on and off. 2. Press the button the number of times for the 1st code, while the yellow light is flashing.3. Press the button the number of times for the 2nd code, while the red light is flashing.4. Press the button the number of times for the 3rd code, while all lights flash.5. If you need end the default settings mode, return step 2 and input the "111" code.
If you need set the other settings, return to step 2.Thable 1-14 shows default settings codes.
Table 1-14. Default Settings Codes
Menu Item Available Options
Default SettingsCodes
1stCode
2ndCode
3rdCode
End of default settings mode 1 1 1
PARALLEL SPEED FAST 1 1 2
SLOW 1 1 3
Bi-D ON 1 1 4
OFF 1 1 5
SERIAL* WORD LENGTH 8 1 2 1
7 1 2 2
BAUD RATE 9600 1 2 3
19200 1 2 4
38400 1 2 5
27600 1 3 1
300 1 3 2
600 1 3 3
1200 1 3 4
2400 1 3 5
4800 1 4 1
PARITY NONE 1 4 2
EVEN 1 4 3
ODD 1 4 4
STOP BIT 1 1 4 5
2 1 5 1
DTR ON 1 5 2
OFF 1 5 3
XON/XOFF ON 1 5 4
OFF 1 5 5
* With option
Table 1-14. Default Settings Code (Continued)
Menu Item Available Options
Default SettingsCodes
1stCode
2ndCode
3rdCode
General Description EPL-5500 Service Manual
1-24 Rev. B
EMULATION PARALLEL LJ4 2 1 1
ESCP2* 2 1 2
FX* 2 1 3
I239X* 2 1 4
PS* 2 1 5
GL2 2 2 1
AUTO* 2 2 2
SERIAL* LJ4 2 3 2
LT*
AUX*
SERIAL* ESC/P2* 2 3 3
LT*
AUX*
SERIAL* FX* 2 3 4
LT*
AUX*
SERIAL* I239X* 2 3 5
LT*
AUX*
SERIAL* PS* 2 4 1
LT*
AUX*
SERIAL* GL/2 2 4 2
LT*
AUX*
SERIAL* AUTO* 2 4 3
LT*
AUX*
* With option
EPL-5500 Service Manual General Description
Rev. B 1-25
Table 1-14. Default Settings Code (Continued)
Menu Item Available Options
Deafult SettingsCodes
1stCode
2ndCode
3rdCode
ESC/P2* / FX* CG Table PcUSA 2 5 3
Italic 2 5 4
PcMultilin 2 5 5
PcPortugue 3 1 1
PcCanFrenc 3 1 2
PcNordic 3 1 3
PcTurkish 3 1 4
PcE.Europe 3 1 5
BpBRASCII 3 2 1
BpAbicomp 3 2 2
STATUS SHEET LANGUAGE ENGLISH 3 2 3
FRENCH 3 2 4
GERMAN 3 2 5
ITALIAN 3 3 1
SPANISH 3 3 2
PRINTING PAGE SIZE A4 3 5 1
LT 3 5 2
LGL 3 5 3
CTM 3 5 4
ORIENTATION PORT 3 5 5
LAND 4 1 1
MANUAL FEED OFF 4 1 2
ON 4 1 3
TONER SAVER OFF 4 1 4
ON 4 1 5
JOB RESOLUTION 600 4 2 1
300 4 2 2
CONFIG AUTO CONT OFF 4 2 3
ON 4 2 4
STANDBY ENABLE 4 2 5
DISABLE 4 3 1
INTERFACE AUTO 4 3 2
PARALLEL 4 3 3
SERIAL 4 3 4
LT 4 3 5
AUX 4 4 1
* With option
General Description EPL-5500 Service Manual
1-26 Rev. B
1.4.4 Display of MessagesThis printer indicates three types of messages with the LED lights or status sheet: status messages,error messages, and the service call error message.
1.4.4.1 Status MessagesThe LED lights normally indicate the printer’s status. (Refer to Section 1.4.1.)
1.4.4.2 Error MessagesIf any of the following errors occurs, it will be printed on the status sheet (Refer to Section 1.4.2.).Clear the error immediately using the measures shown in the following table.
Table 1-15. Error MessagesMessage Status Measures
SOFT ERROR Printer detected a CPU error or softerror. (Refer to Chapter 5.)
—
PAPER JAM A paper jam has occurred. Open the cover and remove thejammed paper. Then close the cover.
PRINTER OPEN Cover is open. Close the cover.MANUAL FEED Select manual feed and begin
printing data.Insert paper and press button.
PAPER SET No paper is left in either thestandard tray or the optionalcassette.
Load paper in paper tray or optionalcassette and press button.
PRINT OVERRUN Engine speed faster than print imageprocessing.
Press the button.
MEM OVERFLOW Data has filled the buffer. Confirm and press the button. Andadd optional SIMM.
CHECK PAPER SIZE The paper size in the tray is differentfrom the paper size chosen.
Change the paper and print again.
IMAGE OPTIMUM The printer uses a lower printquality.
Erase downloaded data or add aSIMM.
1.4.4.3 Service Call Error MessageThe LED lights flash randomly, when the printer detects a service call error. (Refer to Chapter 5.).
EPL-5500 Service Manual General Description
Rev. B 1-27
1.4.5 Printer SharingThis section describes printer sharing. This printer has two methods of printer sharing, port fixedmode and auto sense mode. These modes are selected by “INTERFACE” in the printer settingsmenu.
1.4.5.1 Port Fixed ModeWhen the printer is in port fixed mode, only one interface port is active. Data from other ports isignored.
1.4.5.2 Auto Sense Mode
It is possible to allocate each mode to parallel, serial, L/T, and AUX. The entire memory will beallocated to the channels that are used. The interface that receives the data first will print first.
HP mode
ESC/P2 mode
FX mode
GL2 mode
EPSONScr iptm od e
Parallel
Mode Ass ignment
User 1
Memory
HP mode
ESC/P2 mode
FX mode
GL2 modeEPSONScr iptm od e
L/T orSer ial orA U X
Mode Ass ignment
User 2
Input buffer
Switched byprinter sett ings
Figure 1-10. Port Fixed Mode
HP m ode
ESC/P2 mode
FX mode
GL2 modeEPSONScr iptm od e
Parallel
Mode Ass ignment
User 1
MemoryHP m od e
ESC/P2 mode
FX mode
GL2 modeEPSONScr iptm od e
Serial orL/T orA U X
Mode Ass ignment
User 2
Input buffer
Input buffer
Auto Sense
Figure 1-11. Auto Sense Mode
General Description EPL-5500 Service Manual
1-28 Rev. B
1.4.6 Emulation Mode Switch FunctionThis section describes the emulation mode switch function.
1.4.6.1 Emulation Switch by SPLThe two types of emulation switch function described below are available on this printer. Togetherthey are referred to as SPL (Shared Printer Language).
EJL: EPSON Job Language
This is EPSON’s original language system. It is used to skip among various destinations, as shownin Figure 1-12.
PJL: Printer Job Language
This is HP’s original language, which is available with LaserJet 4 printer. It is used to skip amongvarious destinations, as shown in Figure 1-12. The precise specifications for this language are basedon HP LaserJet 4.The figure below shows three types of mode switching.Neither EJL nor PJL switches the mode directly. They first exit the current mode and return to EJLor PJL. Then they enter another mode.
1.4.6.2 Intelligent Emulation Switch
Intelligent Emulation Switch (IES) automatically switches emulation mode, depending on the datasent from the host computer through one of the interface channels. It is able to switch betweenEPSONScript and other modes as shown in the figure below.
1.4.7 Bi Resolution Improvement Technology
The EPL-5500 printer has BiRITech (Bi Resolution Improvement Technology), which is designed toimprove print quality at 600 dpi and 300 dpi. By this method, the dot map data extracted from theimage data is reassembled to improve print data.
LJ4
EPSONScript
EPSON GL/2
EJL
PJL
FX
ESC/P 2
Figure 1-12. Emulation Switch by SPL
EPSONScript
LJ4
FX EPSON GL/2
ESC/P 2
Figure 1-13. Intelligent Emulation Switch
EPL-5500 Service Manual General Description
Rev. B 1-29
The main improvement of this technique is in eliminating “jaggies” in diagonal lines. It is mosteffective when the dot map data fits the development characteristics of the printer mechanism well.It is therefore necessary to set appropriate values in printer settings.
Note: BiRITech is not as effective for printing a mesh pattern or gray scale. In such cases,BiRITech must be set to OFF. (The default setting is MEDIUM.) Since the BiRITech effectdepends on the toner condition, adjusted it when the imaging cartridge is replaced or afterthe imaging cartridge is used for a long time.
The following settings are available in printer settings for RITech: DARK, MEDIUM, LIGHT, OFF.The status sheet has the following RITech test image. When the toner density of area A is almost thesame as that of area B (as shown in the figure below), the RITech setting is at its optimum setting. Inother words, the optimum setting is achieved when it is difficult to distinguish the shape of area Afrom that of B.
R
1 2 600
1
2
3
4
600
1 inch
1 inch
3 4
5
6
7
8
(When 600 DPI printing)
Figure 1-14. Effect of BiRITech
A
B
Figure 1-15. RITech Adjustment
General Description EPL-5500 Service Manual
1-30 Rev. B
1.4.8 Toner Save ModeThe Toner Save Mode uses about 50% less toner than normal. The printer saves toner by substiutinga gray shade for the black inside of characters. the outlines of the characters are still printed in fullback.
1.4.9 Optional Memory
If you have difficulty printing complex, graphics-intensive pages or if you regularly usedownloaded fonts, you may need to install one of the optional SIMM sets on this printer’s controllerboard. The printer’s controller board comes with 1MB of RAM installed. By installing additional SIMMs, you can increase the printer’s memory to a total of 32MB, includingthe resident memory.EPSON supplies several types of memory option (SIMMs). Other SIMMs can be purchased fromother vendors. Be sure the SIMM meets the requirements listed below.❏ 72-pin type❏ Capacity is one of the following: 1, 2, 4, 8, 16, 32MB❏ Access speed is less than 70 ns.❏ Within the following dimensional size
36 mm (height) × 108 mm (width) × 10 mm (depth)
Upper Edge
Left Edge
Figure 1-16. Toner save Mode
EPL-5500 Service Manual General Description
Rev. B 1-31
1.5 MAIN COMPONENTS
To simplify maintenance and repair, the main components of the EPL-5500 have been designed foreasy removal and replacement. The main components are:
❏ C169 MAIN-B Board Main board❏ PWB-E Board Power supply circuit board❏ PWB-F Board High-voltage supply circuit board❏ Optical Unit Printhead unit❏ Fusing Unit❏ Photoconductor unit❏ Developer cartridge❏ Housing
Opt ical Unit
C169 MAIN-B Board
PWB-E Board
PWB-F Board
Fusing Unit
Figure 1-17. Component Layout
General Description EPL-5500 Service Manual
1-32 Rev. B
1.5.1 C169 MAIN-B BoardThe C169 MAIN-B board is a video controller and engine controller board. The primary functions ofthis board are receiving print data from the host, generating the print image (video), and sendingthe print image to the engine controller via the video interface. A 32-bit 22 MHz RISC MB86933HSPARKlite CPU in location IC1 is used, and the following memory chips and custom ICs areassigned to the 4GB memory space.❏ Memory chips
Code and font ROMs: four 4M-bit EPROMs (IC13, 14, 15, 16) or two 8M-bit mask ROMs (IC21, 22)Optional NLSP font ROM: 4M-bit or 8M-bit ROM (IC12). Not available in U.S. version.4M-bit DRAMs (IC17, 18)EEPROM (IC11)
❏ Custom ICsASIC E05A91 (IC2)ASIC E05A92 (IC3)ASIC E05A93 (IC4)
❏ OthersReset IC M51953BFP (IC6)
The engine controller consists of an M3807x 8-bit CPU, including a MASK ROM. It controls laserscanning (the polygon mirror drive motor), image synchronization, laser beam pulse width, andpower.There are two types of C169 MAIN-B boards used as after service parts. The following table showsdifferences between them.
Table 1-16. Differences in Components for the C169 MAIN-B BoardUS version Other Version
IC12 None IC socketJumper J20 Open Short
MB86933H(IC1)
E05A91(IC2)
( IC12)
( IC16)
( IC15)( IC14)
( IC13)
M 3807(IC201)
E05A93(IC4)
E05A92(IC3)
Figure 1-18. C169 MAIN-B Board
EPL-5500 Service Manual General Description
Rev. B 1-33
1.5.2 PWB-E BoardThe PWB-E is the power supply board, which consists of a switching regulator circuit. It convertsthe AC line voltage into +24 V and +5 VDC voltages. There are two types of power supply board,the 100/120 V type and 220/240 V type. The difference between the two circuits is only in the inputsection.
CAUTION
Do not touch VR1 on PWB-E board. This volume is for factory setting only.
1.5.3 PWB-F BoardThe PWB-F is the high-voltage supply circuit board. It converts the development bias, OPC drumcharge bias, and image transfer bias.
CAUTION
Do not touch VR3 on the PWB-F board. These volumes are for factory setting only.
F1
VR1
Figure 1-19. PWB-E Board
VR3
Figure 1-20. PWB-F Board
General Description EPL-5500 Service Manual
1-34 Rev. B
1.5.4 Optical UnitThe optical unit consists of the laser diode (semi-conductor laser), the mirror motor (scanner motor)which drives the polygon mirror for laser scanning, and several mirrors and lenses. The laser beamgenerated by the laser diode is conducted to the OPC drum surface by way of the polygon mirror,as well as several mirrors and lenses, to create a latent electro-photographic image on the drum.
1.5.5 Fusing UnitThe fusing unit fixes the toner to the paper using heat and pressure. This unit has a heater lamp,thermistor, and thermal fuse. There are two types of fusing units, the 120 V type and the 220/240 Vtype. The only difference between them is the heater lamp.
Figure 1-21. Optical Unit
Figure 1-22. Fusing Unit
EPL-5500 Service Manual General Description
Rev. B 1-35
1.5.6 Photoconductor UnitCore mechanisms of the printing process, such as charging and imaging, are integrated into thisunit.
1.5.7 Developing CartridgeCore mechanisms of the printing process, such as developing, are integrated into this cartridge.
1.5.8 Lower Paper Casste UnitThis optional paper cassete allows you to feed up an addtional 250 sheets of A4 or B5 paper intothis printer.
Note: While you use A4/B5 paper, jumper JP1 on the circuit board of lower paper casstte unitshould be set to 2-3. While you use letter/ executive paper, jumper JP1 should be set to1-2. Jumper JP2 is fixed to 1-2.
Figure 1-23. Photoconductor Unit
Figure 1-24. Developing Cartridge
General Description EPL-5500 Service Manual
1-36 Rev. B
Chapter 2 Operating Principles
Table of Contents
2.1 ENGINE OPERATION 2-12.1.1 Print Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.1.1.1 Paper Feeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32.1.1.2 Drum Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42.1.1.3 Laser Exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-52.1.1.4 Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-52.1.1.5 Image Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-62.1.1.6 Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
2.1.2 Engine Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-72.1.2.1 Main Motor Functions and Control . . . . . . . . . . . . . . . . . . . . . . . . 2-82.1.2.2 Paper Take-Up Sensor and Paper Exit Sensor. . . . . . . . . . . . . . . 2-92.1.2.3 Fuser Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-102.1.2.4 Scanner Mirror Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-112.1.2.5 Laser Diode Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-122.1.2.6 Bias Voltages and Laser Drive Timing . . . . . . . . . . . . . . . . . . . . 2-132.1.2.7 Fan Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-152.1.2.8 Power Supply Circuit Function and Safety Protection. . . . . . . . . 2-15
2.2 VIDEO CONTROLLER OPERATION 2-162.2.1 C169 MAIN-B Board Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
2.2.1.1 Reset Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-192.2.1.2 Bus Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-192.2.1.3 Interrupt Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-202.2.1.4 DRAM Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-202.2.1.5 Parallel Interface Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-212.2.1.6 Video Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
List of Figures
Figure 2-1. Main Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Figure 2-2. Print Process Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2Figure 2-3. Paper Feeding from the Paper Feed Tray . . . . . . . . . . . . . . . . . . . . 2-3Figure 2-4. Paper Feeding from the Lower Paper Cassette . . . . . . . . . . . . . . . . 2-4Figure 2-5. Drum Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4Figure 2-6. Laser Exposure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5Figure 2-7. Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5Figure 2-8. Image Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6Figure 2-9. Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6Figure 2-10. Engine Controller Connecting Diagram . . . . . . . . . . . . . . . . . . . . . 2-7Figure 2-11. Gear and Roller Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8Figure 2-12. Main Motor Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9Figure 2-13. Paper Take-Up Sensor and Paper Exit Sensor On/Off Timing . . . 2-9Figure 2-14. Fuser Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10Figure 2-15. Temperature for Fuser Control Procedure . . . . . . . . . . . . . . . . . . 2-10Figure 2-16. Scanner Motor Control Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11Figure 2-17. Laser Diode Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12Figure 2-18. LDATA Generation Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12Figure 2-19. Laser Emission Power Adjustment Timing . . . . . . . . . . . . . . . . . . 2-12
Figure 2-20. High-Voltage Supply Block Diagram . . . . . . . . . . . . . . . . . . . . . . 2-13Figure 2-21. Print Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14Figure 2-22. Print Sequence (Start) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14Figure 2-23. Print Sequence (End). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14Figure 2-24. Power Supply Circuit Block Diagram. . . . . . . . . . . . . . . . . . . . . . 2-15Figure 2-25. Video Controller Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16Figure 2-26. C169 MAIN-B Board Block Diagram . . . . . . . . . . . . . . . . . . . . . . 2-16Figure 2-27. Data Flow Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18Figure 2-28. Reset Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19Figure 2-29. Bus Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19Figure 2-30. DRAM Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20Figure 2-31. Parallel Interface Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
List of Tables
Table 2-1. Functions of C169 MAIN-B Board Main Elements . . . . . . . . . . . . . 2-17
2.1 ENGINE OPERATION
This section describes the functions and operating principles of the EPL-5500 engine. Figure 2-1shows the locations and names of the main engine components.
1. Fan Motor (M3) 11. Paper Feeding Tray2. Lower Fusing Roller 12. Paper Lift-up Plate3. Paper Exit Sensor (PC3) 13. Paper Empty Sensor (PI1)4. Upper Fusing Roller 14. Paper Take-up Roller5. Heater Lamp (H1) 15. Paper Transport Roller6. Paper Exit Roller 16. Paper Take-up Sensor (PC1)7. Print Tray 17. Pre-image Transfer Roller8. Optical Unit 18. Electrode Comb9. Toner Cartridge 19. Drum Cartridge10. Manual Feed Guide
Optional Second PaperFeeding Unit
1
2
3
4 56
7
8
9
10
11
12
13141516
17
18
19
Figure 2-1. Main Components
EPL-5500 Service Manual Operating Principles
Rev. B 2-1
2.1.1 Print Process
This section describes the print process from paper feeding to paper exit. Figure 2-2 shows adiagram of the print process.
Optical UnitPrint Exit
Fusing
Drum Cartridge
DrumCharge
ImageTransfer
Exposure
TonerHopper
Develop-ment
Toner Cartridge
Paper FeedingTray
Second PaperFeeding Unit(optional)
Multi Feeding(150 sheets)
Manual Feed(1 sheet)
Multi Feeding(250 sheets)
Figure 2-2. Print Process Diagram
Operating Principles EPL-5500 Service Manual
2-2 Rev. B
2.1.1.1 Paper Feeding
Paper can be fed into the printer from the paper feed tray (150 sheets) or from the manual feed slot(1 sheet at a time). Installing an optional second paper feed unit (lower cassette, 250 sheets) addsanother feeding method. Paper fed by the paper take-up roller is transported to the transport roller,pre-image transfer roller, and then exit roller. After this, the paper is fed out onto the print tray. Thestarting position of an image is decided by the paper take-up sensor (PC1). A photo sensor is usedas the paper take-up sensor (PC1) and the paper exit sensor (PC3).
Paper Feeding Tray (Standard Tray)
When the paper take-up solenoid is energized, the main motor (M1) drive is transmitted to thepaper take-up roller via the paper take-up clutch (a one-way clutch) to rotate the paper take-uproller one revolution. At the same time, the depression cam rotates and releases the paper lift-upplate to feed the top (first) paper. The fixed separating pad is used for the paper separation system.It prevents the second or later sheets from being fed together with the top paper.
Upper Fusing Roller Paper Exit Roller
LowerFusingRoller
PC Drum
Pre-Image TransferRoller
Paper Lift-Up Plate
Fixed SeparatingPad
Transport Roller
Paper Take-Up Sensor (PC1)
Paper Exit Sensor(PC3)
Paper Take-UpRoller
DepressionCam
Paper Take-Up Clutch
Paper Take-UpSolenoid (SL1)
When SL1 is de-energized
When SL1 is energized
Paper Lift-Up Plate Paper
Figure 2-3. Paper Feeding from the Paper Feed Tray
EPL-5500 Service Manual Operating Principles
Rev. B 2-3
Second Paper Feed Unit (Optional Lower Cassette)
This unit contains no drive motor, so the main motor (M1) drive is transmitted to the paper take-upand transport sections in the unit via the drive transmission gear. Although the feeding method isthe same as for the paper feed tray in the printer, this unit uses a corner separation system as itspaper separating function. The paper take-up solenoid in the lower cassette is controlled by theprinter via a circuit board in the optional unit.
When the paper regulation plate is set to the inside position, switch S1 on the circuit board isautomatically turned on, causing the printer to recognize that B5-size paper will be fed. On the otherhand, when the paper regulation plate is set to the outside position, S1 remains off, causing theprinter to recognize that A4-size paper will be fed.
2.1.1.2 Drum Charge
The PC drum is charged with static electricity before laser exposure. The rotating charge brush andpre-film are used as the charging method. Less ozone is generated by the corona charge of therotating charge brush and the pre-film, and the PC drum can be charged with low voltage becausethe charge is dirctly applied to the PC drum. The rotating charge brush is rotated by the drive of theM1 main motor via its gear.
PWB-A
Paper Empty Sensor (P|1)
Paper RegulationPlate
Paper Take-Up Roller
Paper Take-Up Clutch
Drive TransmissionGear
Paper Lift-Up Plate
Transport Roller
Corner SeparationPlate
Paper Take-UpSolenoid
Figure 2-4. Paper Feeding from the Lower Paper Cassette
Drum Cartridge
Rotating ChargeBrush
PC DrumProtectingShutter
PC Drum
Charged Surface:(approx. -800 V)
PC DrumProtectingShutter
Drum Chargingand Pre-fi lm Bias
PWB-FC169 MAIN-B
A
B Pre-film
A: Drum Charging BiasB: Drum Ground
IC201
Figure 2-5. Drum Charge
Operating Principles EPL-5500 Service Manual
2-4 Rev. B
2.1.1.3 Laser Exposure
The laser beam, emitted from the optical unit, makes an invisible static image. The SOS (start ofscan) sensor, installed on the laser diode control board (PWB-D), unifies the laser emission timingfor each scan line.
2.1.1.4 Development
Toner is applied to the invisible static image on the PC drum and a toner image is created on thesurface. When the PC drum starts to rotate (when the main motor is activated), the PC drumsurface remains 0 V at the position between the rotating charge brush and sleeve roller. At thistime, a specified positive voltage is applied to the sleeve roller to prevent toner from being attractedback onto the PC drum (reverse bias control).
1. Toner hopper: Contains toner.2. Toner agitating screw: Stirs the toner in the hopper and sends the toner to the toner transport
roller.3. Toner transport roller: Transports the toner to the sleeve roller.4. Doctor blade: Spreads a thin, even coat of toner over the resin sleeve. The toner is negatively
charged by passing between this blade and resin sleeve.5. Sleeve roller: Rotates the resin sleeve.6. Resin sleeve: Carries the toner to the PC drum surface for development.7. Bias seal: Collects the toner remaining on the resin sleeve.8. PC drum: Is exposed to the laser to create an invisible image and rotates to carry the developed
image to the paper surface.
Charged Surface
Laser-Exposed Surface:(Approx. -50 V)
PWB-D
SOS Sensor
Reflector Mirror
Laser Diode
M2
CN210
CN205
C169 MAIN-B
IC201
1
5
1
7
Figure 2-6. Laser Exposure
2
4
3
Vs terminal
VB terminalVBL terminal
VB (Developing Bias)
VBL (Toner Blade Bias)
Vs (Lower Seal Bias)
PWB-F
CN1F
CN204
C169 MAIN-B
IC201
1
8
1
8
Figure 2-7. Development
EPL-5500 Service Manual Operating Principles
Rev. B 2-5
2.1.1.5 Image Transfer
The electrode comb is an image transfer system that transfers the toner image on the PC drum ontothe paper.
2.1.1.6 Fusing
The toner image transferred onto the paper is fixed securely using a heat roller system as the fusingsystem. The upper fusing roller, which is heated by the heater lamp, fuses the toner image, which issecurely fixed by the pressure between the upper and lower fusing rollers. Thermistor TH1 detectsand controls the temperature of the upper fusing roller. Thermal fuse TF1 blows when thetemperature exceeds 200° C, shutting down power to the heater lamp.
Image Transfer Unit
Housing
Pre-Image Transfer Roller
Housing
Electrode Comb
Electrode Comb
Housing
Pre-Image TransferRoller
Housing Ground
Image Transfer Bias
PWB-F
CN1F
PWB-S
C169 MAIN-B
IC201
CN2041
8
1
8
1
8
1
8
Figure 2-8. Image Transfer
Lower Fusing Roller
Thermal Fuse
Thermistor
Upper FusingRoller
Heater Lamp
Paper
Figure 2-9. Fusing
Operating Principles EPL-5500 Service Manual
2-6 Rev. B
2.1.2 Engine Control
This section describes engine control, the power supply board, and the high-voltage supply board.The engine is controlled by the main board (C169 MAIN-B Board). Figure 2-10 shows the enginecontroller connecting diagram.
C169 MAIN-B Board
MainMotor(M1)
PolygonMotor(M2)
FanMotor(M2)
ExitSensor(PC3)
PaperTake-upSensor(PC1)
PaperTake-upSolenoid(SL1)
FusingRollerThermistor(TH1)
PWB-SPWB-FHighVoltageUnit
Image TransferHousing
Image TransferCharger
PWB-APaperTake-upSolenoid(SL2)
2nd Paper FeedingUnit (Option)
PWB-DLaserDiodeDrive
PWB-EPowerUnit
Heater Lamp
Interlock Switch
Figure 2-10. Engine Controller Connecting Diagram
EPL-5500 Service Manual Operating Principles
Rev. B 2-7
2.1.2.1 Main Motor Functions and Control
The M1 main motor transmits the drive to the printer rollers and the optional second paper feed unit(lower cassette) via each gear as shown below.
Toner Cartridge
Sleeve Roller A
Paper Exit Roller
Upper Fusing RollerLower FusingRoller
PC Drum
Pre-image TransferRoller
Main Motor (M1)
Optional Second Paper Feeding Unit
Paper Take-Up Roller
Paper Transport Roller
A
Fig.2-11. Gear and Roller Positions
Operating Principles EPL-5500 Service Manual
2-8 Rev. B
Figure 2-12 shows the main motor drive circuit. The M1 main motor is a four-phase stepping motorcontrolled by the CPU (IC201) on the main board (C169 MAIN-B). This board has a stepping motordriver IC that drives the M1 main motor with a constant current.
2.1.2.2 Paper Take-Up Sensor and Paper Exit Sensor
The paper take-up sensor has three functions:1. To detect the top edge of paper. The engine starts printing when the detection signal
is received.2. To detect paper size. The printer detects the time it takes for paper to pass the paper
take-up sensor during paper feeding. If this time is long, longer paper is feeding; if the time is short, shorter paper is feeding.
3. To detect paper jams and feed jams.
If the paper take-up sensor does not turn on for paper feeding, the printer detects a feed jam or nopaper. A feed jam is a paper jam that occurs in the feed process.
If any of the following conditions is detected, the printer detects a paper jam. A paper jam is a jamthat occurs in the printing process area.
• The paper take-up sensor (PC1) or the paper exit sensor (PC3) is on at power on or when theupper case is closed.
• The paper take-up sensor (PC1) or the paper exit sensor (PC3) is not turned on/off within thespecified time. (Refer to the following timing chart.)
A
B
CN206
4321
Main Motor M1
Main BoardC169 MAIN-B
B
A
Figure 2-12. Main Motor Drive Circuit
2.0 11.0
Take Up Solenoid ON
3.5-4.5 3.4-4.7
[seconds]
PC1(CN203-3)
PC3(CN208-3)
Figure 2-13. Paper Take-Up Sensor and Paper Exit SensorOn/Off Timing
EPL-5500 Service Manual Operating Principles
Rev. B 2-9
2.1.2.3 Fuser Control
The heater lamp, powered by AC voltage, heats the fuser. When the power supply board receivesa FUSER signal from the main board (C169 MAIN-B), the power supply board (PWB-E) suppliesthe AC voltage to the heater lamp. This AC voltage is cut by an interlock switch when the case isopen.
Thermistor TH1 detects the surface temperature of the upper fusing roller and inputs that analogvoltage to the 77-pin chip, IC201. Based on this temperature data, the heater lamp on/off signal (theFUSER signal) is output from the 54-pin chip, IC201, causing heater lamp H1 to turn on or off tocontrol the fusing temperature. When the heater lamp is not turned off even if the thermistor detectsa high temperature malfunction (which occurs if the surface temperature of the upper fusing rollerexceeds 200º C), the signal from the 75-pin chip, IC201, changes from H to L to turn off the heaterlamp forcibly.
The following figure shows the fuser temperature control procedure.
1. Warm up: After printer initialization, printer warm up starts, and the heater lamp turns on until the upper fusing roller’s temperature reaches approximately 172º C.
2. Standby: In standby mode, the upper fusing roller’s temperature is controlled to maintain 156º C. When this condition continues for 3 minutes, the printer goes into standby mode at low temperature.
3. Print cycle: When the printer receives the printing command from the controller, the upper fusing roller is controlled to maintain 172º C.
4. Standby at low temperature: The upper fusing roller is controlled to maintain 112º C.
C169 MAIN-B
IC201
77
54
75
Analog Voltage Detected by theThermistor (TH1)
5 VDC
L
H
IC202B56
4
L
H
H H
23
1IC202A
4 3
L
L H1:ONH H1:OFF
12
1
5
1
5
TH1
Thermistor
PWB-E 123
H1
TF1
Heater Lamp
Thermal Fuse
Heater LampON/OFF Signal
CN202
CN207
CN1E
CN3E
Figure 2-14. Fuser Control Circuit
Temperature (Degrees C)
172
156
112
Power On
Warm up Standby Standby with LowTemperature
Time
When a print is made immediately after warm up
Figure 2-15. Temperature for Fuser Control Procedure
Operating Principles EPL-5500 Service Manual
2-10 Rev. B
EPL-5500 Service Manual Operating Principles
Rev. B 2-11
If any of the following conditions are detected, the printer indicates a fuser error:
1. If the thermistor detects the temperature has not risen by 20º C for 50 msec. within 12 to 30 sec. after warm up. (This error applies only when the thermistor detects a temperature of 90º C or less.)
2. If the thermistor detects that the temperature has not reached 172º C within 60 sec. after warmup.3. Except in pause mode (see the note below), if the thermistor detects that the temperature in the
idle state has fallen to 80º C or lower for 50 msec., or the temperature during printing has fallen to 133º C or lower.
4. The thermistor detects that the temperature has exceeded 193º C for 50 msec. duringtemperature
control.
Note: Pause Mode: In this mode, the control temperature is decreased to save power in the idlestate, the heater lamp is turned OFF.
Thermo fuse TF1 cuts power if the temperature of the fusing section rises to an abnormally highlevel (over 200° C, 392° F).
2.1.2.4 Scanner Motor Control
Figure 2-16 is the scanner motor (M2) control circuit. The scanner motor is driven while it receivesthe POLYGON CTL signal. Motor rotation speed is 8622 rpm
If the any of following conditions are detected, the printer indicates a scanner motor error:
1. The SSCAN signal has not been given once within 1 sec. after the scanner motor is energized.2. The number of scanner motor rotations has not stabilized within ± 0.5 rpm by 4.2 sec. after the
motor is energized.3. The number of scanner motor rotations has exceeded ± 3% for more than 0.5 sec. after the motor
is energized, even if the rotation number stabilizes within ± 0.5 rpm.
+24VGND2
54321CN210
Main Board(C169 MAIN-B) Scanner Motor
M2
NC
+5VP_CTL
Figure 2-16. Scanner Motor Control Circuit
Operating Principles EPL-5500 Service Manual
2-12 Rev. B
2.1.2.5 Laser Diode Drive
Figure 2-17 shows the laser diode drive circuit. Laser diode emission is controlled by three signals(LDATA, LDAPC1, and LDAPC2) from the main board (C169 MAIN-B).
The LDATA signal is the laser on/off signal. When it is LOW, the laser emits, and when it is HIGH,the laser stops emitting. LDATA is the combination of the two signals in the figure below. If theVIDEO or the FORCED LASER DIODE ON signal is activated (LOW), the LDATA signal will beactive. The VIDEO signal is an image signal sent from the video controller circuit. The FORCEDLASER DIODE ON signal is a laser emission signal to apply the laser beam to the SOS sensor.
The laser diode is forcibly activated after scanner motor M2 turns on. At this time, laser emissionpower is adjusted. LDAPC1 and LDAPC2 are the laser emission power adjust signals; they areanalog signals. LDAPC1 is a tuning, and LDAPC2 is a fine tuning.
If any of the following conditions are detected, the printer indicates a laser error:
The LDAPC1 signal or LDAPC2 signal has been out of the specified range while laser power isadjusted.
SSCANLD_CTL
LDAPC1LDAPC2
L DATA
Main Board(C169 MAIN-B)
LDSOS(PWB-D)
Laser Diode
SOS Sensor
SOS Mirror
Figure 2-17. Laser Diode Drive Circuit
L DATA
Forced Laser Diode ON
VIDE Ofrom the VideoController Circuit(C169 MAIN-B)
Figure 2-18. LDATA Generation Circuit
Scanner Motor On
LDATA
LDAPC1
LDAPC2
P_CTL
Figure 2-19. Laser Emission Power Adjustment Timing
EPL-5500 Service Manual Operating Principles
Rev. B 2-13
2.1.2.6 Bias Voltages and Laser Drive Timing
Figure 2-20 is a diagram of the drum charge bias voltage, image transfer bias voltage, and thedeveloping bias voltage control circuit. These bias voltages are generated from the +24 VDC fromthe high-voltage supply board (PWB-F). If the printer detects a case-open condition, the interlockswitch is set to off, which cuts the +24 VDC, which, in turn, cuts the bias voltages.
These bias voltages are controlled by the main board (C169 MAIN-B). The HV-T signal is theimage transfer bias voltage control. While this signal is LOW, the image transfer electrode comb ischarged to from +3 to +6K VDC by the high-voltage supply circuit. HV SEL1 and HV SEL2 areimage transfer bias level control signals.
The HVB signal is the digital signal for developing bias voltage control. This signal controls the biason/off. The BIAS MON signal controls the bias voltage level (–300 V to –375K VDC) using pulsedata. The image density is controlled by the developing bias voltage level.
+24 VDC
InterlockSW
Power SupplyBoard(PWB-E)
+24 VDC
HV-C
HV-THV SEL1
Image TransferBias 3K to 6 K VDC
DevelopingBias-270 to -370 VDC
Drum Charge-2.0 K VDC
MainBoard(C169 MAIN-B)
High Voltage SupplyBoard(PWB-F)
Doctor Toner BladeBias -500 VDC
HV SEL2HV B
BIAS MON
Seal Bias -250 VDC
PWB-S
Figure 2-20. High-Voltage Supply Block Diagram
Operating Principles EPL-5500 Service Manual
2-14 Rev. B
Figure 2-21 shows the print process.
Figure 2-22 shows the start print sequence. The printer’s engine starts printing when it receives thePRINT signal from the video controller circuit.
Figure 2-23 is the end of the print sequence.
Brush Roller Charging
Laser Exposure
PC Drum
Image Transfer
Development
Figure 2-21. Print Process
[m sec.]
PrintCommand
Polygon Motor(M3)
Paper Take-upSensor (PC1)
Paper Take-upSolenoid(SL1/2)
Main Motor(M1)
Drum Charge
LaserExposure
Development
ImageTransfer
20
200
500300
2310
150
500
260
1st:770, 2nd:2820
1st: 790 to 13002nd: 2670 to 3080
480
1st: 15102nd: 1680
M3 normal rotation
4000
Figure 2-22. Print Sequence (Start)
[m sec.]
Polygon Motor(M3)
Main Motor(M1)
Drum Charge
LaserExposure
Development
ImageTransfer
Paper ExitSensor (PC3) 5160
850
480
Figure 2-23. Print Sequence (End)
EPL-5500 Service Manual Operating Principles
Rev. B 2-15
2.1.2.7 Fan Motor Control
The fan motor (M3) rotates at engine initialization, and stops after 2 sec. The fan motor also rotatesduring printing. When printing ends, the fan motor stops after 3 min. If the following condition isdetected, the printer indicates a Fan motor error.
The voltage equivalent to the motor current of the fan motor remains 160 mV or lower for 2 sec.
2.1.2.8 Power Supply Circuit Function and Safety Protection
The printer’s power supply board (PWB-E) supplies the +5 VDC and +24 VDC. The +24 VDC isused as the bias voltage supply, main motor (M1) drive, scanner motor (M2) drive, fan motor (M3)drive, and solenoid drive. For safety protection, the +24 VDC line is cut when the interlock switch(case open switch) is off.
AC IN
InterlockSW
+24 VDC
+5 VDC
FG
SG
Power Supply Board(PWB-E)
Figure 2-24. Power Supply Circuit Block Diagram
Operating Principles EPL-5500 Service Manual
2-16 Rev. B
2.2 VIDEO CONTROLLER OPERATION
The video controller section generates the video signals for received data. The video controllersection is the C169 MAIN-B Board.
2.2.1 C169 MAIN-B Board Operation
Figure 2-26 shows a block diagram of video controller section of the C169 MAIN-B Board. TheC169 MAIN-B Board contains the video controller, which consists of a MB86933H (SPARKlite, 22.5MHz, 32-bit bus) RISC CPU; the standard cells developed for this printer; DRAMs; ROM; and anEEPROM.
C169 MAIN-B Board
Video Controller Section
Engine Controller Section
Figure 2-25. Video Controller Section
ROM 16M(IC21, 22 orIC13, 14,15, 16)
EEPR O M(IC11)
E05A91(IC 2)
Option
RS-232C
D R AM s(IC 17, 18)an dSI M M
A D D R ES SD AT ACONTRO L
E05A93(IC4)
C P UMB86933H(IC1)
RO M8(IC12)
E05A92(IC3)
I /O DATAADDR ES S
Video I/F ParallelI/F
Specif ic I/FLocalTalk
Figure 2-26. C169 MAIN-B Board Block Diagram
EPL-5500 Service Manual Operating Principles
Rev. B 2-17
Table 2-1 lists the functions of the main elements of the video controller section in C169 MAIN-BBoard.
Table 2-1. Functions of C169 MAIN-B Board Main Elements
Element Location Function
MB86933H RISCCPU
IC1 The CPU, which operates at 22.5 MHz, manages the videocontroller operation.
E05A91 ASIC IC2 This ASIC contains the following functions:•Address decoding•DRAM management (refresh control, RAS/CAS control)
E05A92 ASIC IC3 This ASIC contains the following functions:•Video signal processing•Toner save function•BiRITech•EMGTech
E05A93 ASIC IC4 This ASIC contains the following functions:•Video interface•Bi-parallel interface•LocalTalk module control•Type-B EX interface box control
Two 8M ROMs orfour 4M ROMs
IC21,22 orIC13,14,15,16
These ROMs are code and font ROMs.
8M ROM IC12 This ROM is a local language (font) ROM option (except inthe U.S. model).
EEPROM IC11 This EEPROM stores the following:•Model type•Printed page counter value•Jam counter value•Printer setting
DRAM IC17,18 These DRAMs are used as the working area of the CPU:input buffer, image buffer, etc.
Operating Principles EPL-5500 Service Manual
2-18 Rev. B
Print data and commands transmitted from the host computer via the parallel or optional interfacesare read using the CPU interrupt process and stored in the DRAM input buffer. Data and commandsin the input buffer are processed by the CPU, which then stores the printing bitmap data (imagedata) in the V (video) -RAM (image buffer) area of the DRAM. The size of the V-RAM depends onthe available DRAM size. A “PRINT OVERRUN” occurs when the V-RAM is so small that the CPUcannot process data faster than it is transmitted to the engine controller board. If such an erroroccurs, the user can increase the V-RAM using the printer setting “IMAGE OPTIMUM.”
The E05A91 transmits image data stored in the V-RAM to the E05A92. The E05A92 changes theimage data format from 32-bit parallel data to serial data, and stores it in the internal temporarybuffer. The temporary buffer has a capacity equivalent to several lines. This is controlled by theE05A92, which synchronizes and transmits the temporary buffer’s data to the engine controllerboard. The E05A92 then manipulates the printer data based on the BiRITech, EMGTech, and tonersaver settings.
Host Computer
Input Buffer
Development
VR AM System Area
D R A M
Parallel/Ser ialConverter
RITechEMGTechToner save
TemporaryBuf fer
CPUMB86933H(IC1)
E05A91(IC2)
E05A93(IC4)
E05A92(IC3)
Video
Figure 2-27. Data Flow Diagram
EPL-5500 Service Manual Operating Principles
Rev. B 2-19
2.2.1.1 Reset Circuit
The entire system (CPU and external devices) can be initialized if the RESET signal (CPU pin 113)are active simultaneously. This circuit uses an M51938 IC to monitor the supply voltage if a voltagelevel less than 4.25 V is detected. The reset time is approximately 128 ms.
2.2.1.2 Bus Control Circuit
The MB86930 CPU outputs the R/W (read/write) signal, AS (address strobe) signal, and the BE0,BE1, BE2, and BE3 signals (byte enables) to the ASIC E05A91. The ASIC E05A91 uses thesesignals to generate the RD (read strobe) signal, WR (write strobe) signal, and READY signal.
+5 V
Vcc
+ C
OUT
+5 V
M51938FP(IC6)
RESETRSTOUTRSTIN
E05A92(IC3)
Figure 2-28. Reset Circuit
R/W
AS
BE0-3
RD WR
READY
DataBus
AddressBus
CPUMB86933H(IC1)
E05A91(IC2)
Figure 2-29. Bus Control Circuit
Operating Principles EPL-5500 Service Manual
2-20 Rev. B
2.2.1.3 Interrupt Control
The ASIC E05A93 determines the priority level of the interrupt and outputs it to terminals IRL0 -IRL3. Then an interrupt is sent to the CPU. When the IRL0-3 value is 1111b, the CPU process is anon-maskable interrupt process. When the IRL0-3 value is 0000b, the CPU process is a standardprocess. When the IRL0-3 is any other value, the CPU process is a maskable interrupt process.
2.2.1.4 DRAM Management
The video controller uses DRAMs for the system RAM and for the V-RAM. In this printer, a standardtwo 512K × 16 DRAMs are mounted in locations IC17 and IC18, providing a total of 1MB. CN2SIMM sockets are provided for optional SIMM memory modules. These SIMM sockets can use 1, 2,4, 8, 16, and 32 MB SIMMs (32-bit bus).
The DRAMs (including optional SIMMs) are managed by the ASIC E05A91. E05A91 outputsMA0-10 (memory address), RAS/CAS, and WE signals.
CAS0,1,2,3
DRAM(IC17)
DRAM(IC18)
DWE
RAS0RAS1,2
MA0-10
CPU DATA BUS
SIMME05A91(IC2)
Figure 2-30. DRAM Management
EPL-5500 Service Manual Operating Principles
Rev. B 2-21
2.2.1.5 Parallel Interface Circuit
Figure 2-31 shows a circuit block diagram of the parallel interface. Data sent from the hostcomputer is latched within the E05A93 by the STROBE signal. The E05A93 outputs a BUSY signalautomatically to stop the host computer from sending additional data. The CPU resets the BUSYsignal after reading the data from the E05A93, so that the printer is ready to receive more data fromthe host computer.
Latch
STROBE
BUSY
DATA
E05A93(IC4)
Figure 2-31. Parallel Interface Circuit
Operating Principles EPL-5500 Service Manual
2-22 Rev. B
2.2.1.6 Video Interface
The ASIC E05A92 maps the SRAM into a memory space different from the system memory. TheCPU transmits data from the V-RAM (in the system RAM) to the SRAM using the ASIC E05A92.The ASIC cell converts the image data in the SRAM from parallel to serial, synchronizes it, and thentransmits it to the engine controller board. In other words, the SRAM is a temporary buffer used totransmit the image data to the engine controller board. This serial image data is called the VIDEOsignal of video interface.
The signal line of the internal video interface circuit (the C125 MAIN board and engine controllerboard) can be broadly divided into four groups. The first group (PRINT, CPRDY, EPRDY, andPRDY) gives the status of either the video controller or engine controller and indicates whether theyare ready to communicate with each other or ready to start the printing operation. The secondgroup (VSYNC, HSYNC) is the synchronizing signal for the printing operation. The third group(VIDEO) is the serial video data signal. The fourth group (CMD, SRCLK, CTBSY, and ETBSY) isused to transfer the commands (from the video controller) or the status (from the engine controller)for printer mechanism control. Except for VIDEO, PRINT, VSINC, and HSYNC, all signals arecontrolled by ASIC E05A93.
This printer has BiRITech and EMGTech functions standard. These functions modify the VIDEOsignal with the ASIC E05A92.
EPL-5500 Service Manual Operating Principles
Rev. B 2-23
Chapter 3 Disassembly and Assembly
Table of Contents
3.1 GENERAL INFORMATION 3-13.1.1 Precautions for Disassembly/Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.1.2 Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.1.3 Small Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23.1.4 Service Checks after Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.2 DISASSEMBLY AND ASSEMBLY 3-43.2.1 Housing Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
3.2.1.1 Case Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43.2.2 Removal of the Controller Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3.2.2.1 Main Board (C169 MAIN-B Board) Removal. . . . . . . . . . . . . . . . . 3-53.2.3 Disassembling the Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
3.2.3.1 Optical Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-63.2.3.2 Image Transfer Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-73.2.3.3 Upper Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-93.2.3.4 High-Voltage Supply Board (PWB-F) Removal . . . . . . . . . . . . . . 3-103.2.3.5 Power Supply Unit (PWB-E) Removal. . . . . . . . . . . . . . . . . . . . . 3-113.2.3.6 Fusing Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-123.2.3.7 Fusing Unit Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-153.2.3.8 Main Motor Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-203.2.3.9 Paper Take-Up Sensor and Paper Take-Up Solenoid Removal. 3-213.2.3.10 Paper Take-Up Roller Removal . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
List of Figures
Figure 3-1. Removing the Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4Figure 3-2. Removing the Shield Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5Figure 3-3. Removing the C169 MAIN-B Board . . . . . . . . . . . . . . . . . . . . . . . . . 3-5Figure 3-4. Removing the Optical Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6Figure 3-5. Removing the Image Transfer Unit -1. . . . . . . . . . . . . . . . . . . . . . . . 3-7Figure 3-6. Removing the Image Transfer Unit -2. . . . . . . . . . . . . . . . . . . . . . . . 3-7Figure 3-7. Moving the Image Transfer Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8Figure 3-8. Reinstalling the Electrode Comb . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8Figure 3-9. Removing the Harness Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9Figure 3-10. Removing the Upper Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9Figure 3-11. Removing the PWB-F Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10Figure 3-12. Removing the PWB-F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10Figure 3-13. Removing the PWB-E Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11Figure 3-14. Removing the PWB-E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11Figure 3-15. Gear and Spring Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12Figure 3-16. Removing the Fusing Guide Plate . . . . . . . . . . . . . . . . . . . . . . . . 3-12Figure 3-17. Removing the Harness Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13Figure 3-18. Removing the Fusing Entrance Guide . . . . . . . . . . . . . . . . . . . . . 3-13Figure 3-19. Removing the Fusing Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14Figure 3-20. Roller Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14Figure 3-21. Removing the Heater Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15Figure 3-22. Removing the Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16Figure 3-23. Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Figure 3-24. Removing the Paper Separator . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17Figure 3-25. Paper Exit Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17Figure 3-26. Removing the G-Rings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18Figure 3-27. Removing the Upper Fusing Roller . . . . . . . . . . . . . . . . . . . . . . . 3-18Figure 3-28. Removing the Lower Fusing Roller . . . . . . . . . . . . . . . . . . . . . . . 3-19Figure 3-29. Removing the Thermal Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19Figure 3-30. Removing the Motor Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20Figure 3-31. Removing the Main Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20Figure 3-32. Removing the Ground Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21Figure 3-33. Removing the Paper Guide ASSY. . . . . . . . . . . . . . . . . . . . . . . . 3-21Figure 3-34. Removing the Gears . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22Figure 3-35. Removing the Paper Take-Up Roller. . . . . . . . . . . . . . . . . . . . . . 3-22
List of Tables
Table 3-1. Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Table 3-2. Screw Types and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2Table 3-3. Checks after Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.1 GENERAL INFORMATION
This chapter describes disassembly/assembly procedures to be used for replacing the mainassemblies of the EPL-5500.
3.1.1 Precautions for Disassembly/Assembly
Follow the precautions below when disassembling/assembling the printer.
WARNING
❒ Disconnect the power cord before disassembling/assembling the printer.❒ Be sure to handle the fusing unit carefully, because the unit remains hot for a whileafter the printer stops printing.❒ If it is necessary to plug in the power cord and operate the printer after disassemblingit, please be careful of the following: 1. Keep your hands and clothing well away from operating or rotating parts (such as rollers, fan motors, etc.). 2. Never touch electric terminals or high-voltage components (such as the charger andthe high voltage unit).
CAUTION
❒ Do not disassemble the photoconductor unit and toner cartridge.❒ If the photoconductor unit is removed from the printer, do not place it in direct sunlight.❒ Do not disassemble the optical unit.❒ Never turn power on if the optical unit is not installed.❒ To prevent damage to ICs from static electricity, do not touch the ICs on the circuit board or the terminals of peripheral electrical components with your hands.❒ Use only the recommended tools to ensure safe and efficient maintenance work. Inappropriate tools may damage the machine.❒ Never open the upper unit until the main motor stops completely. Otherwise, the gears may be damaged.❒ When transporting the printer, remove the photoconductor unit and toner cartridgefrom the printer.❒ When transporting the printer a long distance, pack up the printer using the original packing material.
3.1.2 Tools
Use the tools listed in Table 3-1 for disassembling/assembling the printer and for troubleshooting.
Table 3-1. Tools
Name Commercially Available? Part No.
Philips screwdriver no. 2 Yes B743800200
Regular screwdriver Yes B743000100
Tweezers Yes B641000100
Soldering iron Yes B740200100
Round-nose pliers Yes B740400100
EPL-5500 Service Manual Disassembly and Assembly
Rev. B 3-1
3.1.3 Small Parts
In the following sections, abbreviations are used for small parts, such as screws and washers.Tables 3-2 and 3-3 list these abbreviations.
Table 3-2. Screw Types and Abbreviations
No. Type
Standard
AppearanceSize(mm)
Length(mm)
#1
CB
4 8
#2
CB(S)(P1)
3 6/8
#3
CBS
3 6/8/14
#4
CCS
3 6/8/10/12
#5
CCB
3 8
#6
CBB
3 8
#7
CBS(O)
3 8
Pin
E-Ring
Disassembly and Assembly EPL-5500 Service Manual
3-2 Rev. B
3.1.4 Service Checks after Repair
Check the repaired unit using the following list on completion of servicing.
Table 3-3. Checks after Repair
Item Location Checkpoint Check
Operation Control panel Do all LEDs and button function normally?
Heater lamp Does the heater lamp turn on normally?
Test print (status sheet)
Is the test print performed normally?
Data print Does data print in all modes?
Adjustment Print position Is the gap between the top edge of the paper andthe horizontal line in the status sheet print exactly29.6 mm (1.17 inch).
ROM version Is it the latest version?
Cleaning Is toner and dust removed from the paper path?Is the paper take-up roller cleaned?Is the roller in the fusing unit cleaned?Is the outer surface of the printer clean?
Packing Is the consumable removed from the printer?Is the unit packed securely?Are accessories packed also?
EPL-5500 Service Manual Disassembly and Assembly
Rev. B 3-3
3.2 DISASSEMBLY AND ASSEMBLY
This section describes and illustrates the procedures for removing and disassembling thecomponents of the EPL-5500. Cleaning is described in Chapter 6. The assembly procedures arenot described, except for special notes where necessary, because assembly can be accomplishedby performing disassembly in reverse.
3.2.1 Housing Removal
This section describes how to remove the cases and the rear frame.
3.2.1.1 Case Removal
1. Push the upper unit lock release button and open the upper unit.
2. Remove each cover in the following turn.
ASSEMBLY POINTS
When reinstalling each cover, securely insert the protrusions of the cover into the cutoutsof the printer frame.
2. Front Cover
1. Left cover
3. OperationCover
4. Rear Cover
Upper unit
Upper unit lockrelease button
Figure 3-1. Removing the Housing
Disassembly and Assembly EPL-5500 Service Manual
3-4 Rev. B
3.2.2 Removal of the Controller Section
The control section is comprised of the controller board (the C169 MAIN-B Board).
3.2.1.1 Main Board (C169 MAIN-B Board) Removal
CAUTION
Before you remove the video controller board, make sure that you remove any optionalLocalTalk/ serial board or Type-B EX box.
1. Turn the printer so that its right side faces you.
2. Remove the right cover.
3. Remove 2 screws (#3), and then remove the shield case.
4. Disconnect all connectors on the C169 MAIN-B Board.
5. Remove the 5 screws (#4) for the C169 MAIN-B Board.
6. Remove the C169 MAIN-B Board.
Figure 3-2. Removing the Shield Case
Figure 3-3. Removing the C169 MAIN-B Board
EPL-5500 Service Manual Disassembly and Assembly
Rev. B 3-5
3.2.3 Disassembling the Engine
This section describes disassembling the engine, including the high voltage unit (PWB-F) andpower supply board (PWB-E).
3.2.3.1 Optical Unit Removal
CAUTION
❒ Do not touch the optical unit except at the time of replacement.❒ Do not open the unit under any conditions.❒ Do not remove the circuit board from the optical unit under any conditions.
1. Open the top cover.
2. Remove the right cover, left cover, and front cover. (Refer to Section 3.2.1.1.)
3. Remove the cover shield plate.
4. Disconnect connector CN205 and CN210 from the C169 MAIN Board.
4. Remove the 6 screws (#4) from the optical unit.
5. Remove the optical unit.
Figure 3-4. Removing the Optical Unit
Disassembly and Assembly EPL-5500 Service Manual
3-6 Rev. B
3.2.3.2 Image Transfer Unit Removal
1. Open the top cover.
2. Remove the harness cover A. (Refer to Section 3.2.3.3.)
3. Remove the 2 screws (#5) and holders at both ends of the image transfer unit.
4. Disconnect the 2 connectors and remove the unit.
Figure 3-5. Removing the Image Transfer Unit - 1
Figure 3-6. Removing the Image Transfer Unit - 2
EPL-5500 Service Manual Disassembly and Assembly
Rev. B 3-7
ASSEMBLY POINTS
After reinstalling the image transfer unit, check that the unit smoothly moves up anddown.
5. Remove the remove the electrode comb.
ASSEMBLY POINTS
When reinstalling the electrode comb, be careful of the direction of installation. Install theelectrode comb so that the terminal of the comb faces the image transfer roller drive gear.
Figure 3-7. Moving the Image Transfer Unit
Figure 3-8. Reinstalling the Electrode Comb
Disassembly and Assembly EPL-5500 Service Manual
3-8 Rev. B
3.2.3.3 Upper Unit Removal
1. Open the upper unit.
2. Remove the right cover and left cover. (Refer to Section 3.2.1.1.)
3. Disconnect connectors CN202, CN208, and CN211 from the C169 MAIN-B.
4. Remove harness covers A and B, and pull out the CN1 of the PWB-E board.
5. Remove the image transfer unit. (Refer to Section 3.2.3.2.)
6. Slide and remove the unit as in the illustration.
A
B
Figure 3-9. Removing the Harness Cover
Figure 3-10. Removing the Upper Unit
EPL-5500 Service Manual Disassembly and Assembly
Rev. B 3-9
3.2.3.4 High-Voltage Supply Board (PWB-F) Removal
1. Open the top cover.
2. Remove 1 screw (#5) from the PWB-F cover.
3. Remove the PWB-F cover.
4. Remove the 4 screws (#5) from the PWB-F board.
5. Disconnect 2 connectors.
6. Remove the PWB-F board.
Figure 3-11. Removing the PWB-F Cover
Figure 3-12. Removing the PWB-F
Disassembly and Assembly EPL-5500 Service Manual
3-10 Rev. B
3.2.3.5 Power Supply Unit (PWB-E) Removal
1. Remove the upper unit. (Refer to Section 3.2.3.3.)
2. Remove 6 screws (#4:2, #7:2), and remove the PWB-E cover.
3. Disconnect connector CN207 from the C169 MAIN-B Board.
4. Remove 4 screws (#4) and 2 screws (#6), and remove the PWB-E.
Figure 3-13. Remove the PWB-E Cover
Figure 3-14. Removing the PWB-E
EPL-5500 Service Manual Disassembly and Assembly
Rev. B 3-11
3.2.3.6 Fusing Unit Removal
1. Open the top cover. (Refer to Section 3.2.3.3.)
2. Remove the image transfer unit. (Refer to Section 3.2.3.2.)
3. Remove 1 screw (#5), and remove the drive tension section of the fusing unit.
4. Remove the transport gear.
5. Release the hook of the spring and remove the drive gear section of the fusing unit.
ASSEMBLY POINTS
When rehooking the spring, be sure to hook it at the correct position.
6. Remove 4 screws (#5), and remove fusing guide plate.
drive gear sectionof the Fusing unit
drive transportgear
hook of thespring
drive tension sectionof the Fusing unit
Figure 3-15. Gear and Spring Position
Figure 3-16. Removing the Fusing Guide Plate
Disassembly and Assembly EPL-5500 Service Manual
3-12 Rev. B
7. Remove the harness cover.
8. Remove the fusing entrance guide.
Figure 3-17. Removing the Harness Cover
Figure 3-18. Removing the Fusing Entrance Guide
EPL-5500 Service Manual Disassembly and Assembly
Rev. B 3-13
10. Remove 4 screws (#5), and remove the fusing unit.
ASSEMBLY POINTS
After reinstalling the fusing unit, check the direction of the bushings on the paper exitroller and the connection condition between the roller and the ground plate.
Figure 3-19. Removing the Fusing Unit
Figure 3-20. Roller Position
Disassembly and Assembly EPL-5500 Service Manual
3-14 Rev. B
3.2.3.7 Fusing Unit Disassembly
This section describes how to remove the paper exit sensor, heater lamp, lower fusing roller, andupper fusing roller.
Heater Lamp
CAUTION
Do not touch the glass surface of the lamp with your bare hands.
1. Remove the fusing guide plate. (Refer to Section 3.2.3.6.)
2. Pull the heater lamp out of the lamp holder from the front side.
ASSEMBLY POINTS
When reinstalling the lamp, position its voltage indication to the left side (non-gear end.).
Figure 3-21. Removing the Heater Lamp
EPL-5500 Service Manual Disassembly and Assembly
Rev. B 3-15
Thermistor
1. Remove the fusing unit. (Refer to Section 3.2.3.6.)
2. Remove the 1 screw (#4), and remove the thermistor.
ASSEMBL POINTS
When reinstalling the thermistor, wire the harness as shown below.
Figure 3-22. Removing the Thermistor
Figure 3-23. Wiring
Disassembly and Assembly EPL-5500 Service Manual
3-16 Rev. B
Paper Separator
1. Remove the fusing unit. (Refer to Section 3.2.3.6.)
2. Release the lock of the holder and remove the 3 paper separator.
ASSEMBLY POINTS
When reinstalling the paper separators, be careful of these positions as the middle onediffers from others.
Paper Exit Sensor
1. Remove the fusing unit. (Refer to Section 3.2.3.6.)
2. Remove the paper exit sensor.
Figure 3-24. Removing the Paper Separator
Figure 3-25. Paper Exit Sensor
EPL-5500 Service Manual Disassembly and Assembly
Rev. B 3-17
Fusing Roller
1. Remove the fusing unit. (Refer to Section 3.2.3.6.)
2. Remove the 2 G-rings from the fusing unit.
CAUTION
When reinstalling the G-rings:❒ Be careful of the direction.❒ Securely position them into the grooves of the fusing roller.
3. Remove the upper fusing roller drive gear.
4. Remove the upper fusing roller.
Figure 3-26. Removing the G-Rings
Figure 3-27. Removing the Upper Fusing Roller
Disassembly and Assembly EPL-5500 Service Manual
3-18 Rev. B
5. Take out the lower fusing roller.
Thermal Fuse
1. Remove the fusing unit. (Refer to Section 3.2.3.6.)
2. Remove 2 screws (#5), and remove the thermal fuse.
Figure 3-28. Removing the Lower Fusing Roller
Figure 3-29. Removing the Thermal Fuse
EPL-5500 Service Manual Disassembly and Assembly
Rev. B 3-19
3.2.3.8 Main Motor Removal
1. Remove the housing components. (Refer to Section 3.2.1.1.)
2. Remove 1 screw (#4) which fixing the motor bracket and the 2 screws (#2) which fixing themain motor, and remove the main motor together with the bracket.
Screw (#2)
Screw (#4)
Motor bracket
Figure 3-30. Removing the Motor Bracket
Motor bracket Main motor
Figure 3-31. Removing the Main Motor
Disassembly and Assembly EPL-5500 Service Manual
3-20 Rev. B
3.2.3.9 Paper Take-Up Sensor and Paper Take-Up Solenoid Removal
1. Remove the housing components. (Refer to Section 3.2.1.1.)
2. Turn over the printer on its back.
3. Remove the 4 screws (#6), and remove the ground plate.
4. Turn up the lifting plate.
ASSEMBLY POINT
When turnning up the lifting plate, be carefull with the grounding plate which overlappingthe lifting plate.
5. Remove the 2 screws (#6), and remove the paper guide assembly.
6. Remove the paper take-up sensor and the paper take-up solenoid from the assembly.
Screw (#6)
Ground plate
Figure 3-32. Removing the Ground Plate
Lifting plateScrew (#6)
Paper guide ASSY.
Turn up the plate
Figure 3-33. Removing the Paper Guide ASSY.
EPL-5500 Service Manual Disassembly and Assembly
Rev. B 3-21
3.2.3.10 Paper Take-Up Roller Removal
1. Remove the main motor. (Refer to Section 3.2.3.8.)
2. Remove the paper guide assembly. (Refer to Section 3.2.3.9.)
3. Remove the 6 screws (#4:2, #5:4), and remove the left frame.
4. Remove the 2 gears (GEAR 29/65T, GEAR 22/57T), specified in the figure below.
5. At the bottom of the printer, remove the E-ring fixing the paper take-up roller shaft.
6. Unhock the paper take-up roller and slide the shaft to the end of the shaft where the drivengear is attached, then remove the paper take-up roller.
ASSEMBLY POINT
When removing the paper take-up roller from the shaft, be sure not to lose the pin.
Remove Gears (2)
Paper Take-up Roller Shaft
Slide out
Figure 3-34. Removing the Gears
Paper Take-up Roller E-Ring
Paper Take-up Roller Shaft
Figure 3-35. Removing the Paper Take-Up Roller
Disassembly and Assembly EPL-5500 Service Manual
3-22 Rev. B
Chapter 4 Adjustment
Table of Contents
4.1 ADJUSTMENT 4-14.1.1 Print Position Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
List of Figures
Figure 4-1. Print Position Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.1 ADJUSTMENTS
This section describes the adjustment procedures for the EPL-5500. You must perform theseadjustments after servicing the printer, especially when any component or part is replaced.
4.1.1 Print Position Adjustment
You can adjust the vertical print position on a sheet of paper by turning the image synchronizingvolume control on the main board (C169 MAIN-B). After replacing a main board, be sure to adjustthe print position using the procedure below.
1. Print a status sheet.
2. Check that the registration gap between the leading edge of the sheet and the horizontal lineprinted on the page is within the following range:
29.6 ± 2.5 mm (1.17 ± 0.01 inches) for a status sheet page on A4/letter paper: If the gap is not correct, adjust the print position as described in the next few steps.
3. Turn printer power off.
4. Open the right cover and shield plate. (See Chapter 3.)
5. Adjust the image synchronizing adjustment volume (VR201) on the main board (C169 MAIN-B)so that the gap for the print position of the horizontal line (down from the top edge of the sheet)becomes 29.6 mm (1.17 inches) .
•Turn VR201 clockwise to increase the gap for the print position of the horizontal line.•Turn VR201 counterclockwise to decrease the gap.
6. Turn on the printer.
7. Print a status sheet again to check the print position.
8. Repeat steps 5 to 7 until the print position is 29.6 mm (1.17 inches).
9. Reattach the shield plate and right case.
29.6 mm
EPSON EPL-5500Status Sheet
Default Settings
Leading Edge
Figure 4-1. Print Position Adjustment
EPL-5500 Service Manual Adjustments
Rev. B 4-1
Chapter 5 Troubleshooting
Table of Contents
5.1 OVERVIEW 5-1
5.2 SELF-DIAGNOSTIC FUNCTION 5-15.2.1 SOFT ERROR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15.2.2 Service Call Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
5.3 TROUBLESHOOTING 5-45.3.1 Troubleshooting of Abnormal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 5-45.3.2 Print Quality Anomaly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
List of Tables
Table 5-1. SOFT ERROR Code List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1Table 5-2. Service Call A Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2Table 5-3. Service Call B Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3Table 5-4. Symptoms and Reference Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4Table 5-5. The Printer Does Not Operate at All . . . . . . . . . . . . . . . . . . . . . . . . . 5-5Table 5-6. Both LED Lights Do Not Come On. . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5Table 5-7. The LED Does Not Come On (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5Table 5-8. The LED Does Not Come On (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6Table 5-9. The LED Does Not Come On (3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8Table 5-10. The LED Does Not Come On (4) . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9Table 5-11. Software Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9Table 5-12. Fusing Unit Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9Table 5-13. The Fan Motor Error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9Table 5-14. Scanner Motor Error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9Table 5-15. Laser Light Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10Table 5-16. Communication Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10Table 5-17. EEPROM Write Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10Table 5-18. Engine Initialize Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10Table 5-19. C1000 or C1001 Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10Table 5-20. C1002 Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10Table 5-21. C1003 Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11Table 5-22. C1130 Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11Table 5-23. C1170 Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11Table 5-24. C1180 Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11Table 5-25. C1300 or C1310 Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11Table 5-26. C1320 Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12Table 5-27. C1990 Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12Table 5-28. Print Quality Anomaly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
5.1 OVERVIEW
The EPL-5500 has a sophisticated, built-in, self-diagnostic function that reduces the troubleshootingtime by identifying failed parts or components. This self-diagnostic test identifies the troubleshootingproblems for page printers, in which even a trivial failure can result in a serious print qualityproblem.
5.2 SELF-DIAGNOSTIC FUNCTION
This section describes the self-diagnostic function in which the controller automatically checks theoperating conditions of each component. If any abnormality is detected, the printer prints an errormessage on the status sheet or displays a message with the LED lights.
5.2.1 SOFT ERROR
When the printer detects an error relating to a software operation, the printer indicates it as "SOFTERROR" by slowly flashing the red LED light. By pressing the button on the control panel, theprinter prints the status sheet with error information. Table 5-1 lists the soft error codes.
Table 5-1. SOFT ERROR Code List
Error Code Error Condition
C0001 CPU error (reserved)
C0002 CPU error (programming command error)
C0003 CPU error (illegal instruction)
C0004 CPU error (unsupported FPU instruction)
C0007 CPU error (address misalignment)
C0009 CPU error (reserved)
C0010 CPU error (tag overflow)
C0017 to 31 CPU error (unsupported interrupt)
C0036 CPU error (unsupported coprocessor instruction)
C0128 to 254 CPU error (unimplemented instruction)
C0255 CPU error (break error)
Axxxx Software error
Bxxxx Software error
Dxxxx Software error
Fxxxx to Zxxxx Software error
EPL-5500 Service Manual Troubleshooting
Rev. B 5-1
5.2.2 Service Call Error
If the printer detects a fatal error that unrecoverable by the user, the printer indicates it with the LEDlights as "Service Call Error". There are two types of "Service Call Error" as explained below, andeach error is indicated by the LED lights of the control panel in different manner.
Service Call A Errors
Indication: First, yellow and red LED lights go on and off twice alternately. Then, bothyellow and red LED lights go on and off a number of times correspondningto the error number in the table 5-2.
Example: "Fan motor error" (error number = 2)
Order LED(Yellow)
LED(Red) Interval State
1 ON OFF Short Service callerror indication
2 OFF ON Short
3 ON OFF Short
4 OFF ON Short
5 OFF OFF Long Error code ="2" (LED on for2 times)6 ON ON Short
7 OFF OFF Short
8 ON ON Short
9 OFF OFF Long
Table 5-2. Service Call A Error
Error No. Error Code Error Condition
1 E0003 Fusing unit error
2 E0005 Fan motor error
3 E0006 Scanner mirror motor error
4 E0009 Laser light error
5 E0014 Communication error for engine controller and video controller
6 C1200 EEPROM write error
7 C1400 Engine initialize error
Service call B error
Indication: First, yellow and red LED lights go on and off three times alternately toindicate that the printer start to display "Service Call B Error". The errornumber of "Service Call B Error" consists of 4 digits number, and each LEDlight indicates corresponding number from 4th digit to 1st digit in thefollowing order:
Yellow LED: 4th digit (X---)Red LED: 3rd digit(-X--)Yellow LED: 2nd digit (--X-)Red LED: 1st digit (---X)
Troubleshooting EPL-5500 Service Manual
5-2 Rev. B
Note that if any digit of corresponding error number is "0", both yellow andred LED lights go on and off once at the same time.
EPL-5500 Service Manual Troubleshooting
Rev. B 5-3
Example: "Standard ROM error" (error number = 1130)
Order LED(Yellow)
LED(Red) Interval State
1 ON OFF Short Service Call Error B indication
2 OFF ON Short
3 ON OFF Short
4 OFF ON Short
5 ON OFF Short
6 OFF ON Short
7 OFF OFF Long Error code ="1130"
8 ON OFF Short 4th digit = "1"
9 OFF OFF Long
10 OFF ON Short 3rd digit = "1"
11 OFF OFF Long
12 ON OFF Short 2nd digit = "3"
13 OFF OFF Short
14 ON OFF Short
15 OFF OFF Short
16 ON OFF Short
17 OFF OFF Long
18 ON ON Short 1st digit = "0"
19 OFF OFF Long
Table 5-3. Service Call B Error
Troubleshooting EPL-5500 Service Manual
5-4 Rev. B
Error No.Error Code Error Condition
4 3 2 1
1 0 0 0 C1000 RAM Validation error
1 0 0 1 C1001 System RAM check error
1 0 0 2 C1002 Standard RAM error
1 0 0 3 C1003 Optional RAM (SIMM) error
1 1 3 0 C1130 Standard ROM error
1 1 7 0 C1170 Optional NLSP fonts ROM error
1 1 8 0 C1180 Optional ROM SIMM error
1 3 0 0 C1300 Optional Type-B I/F error
1 3 1 0 C1310 Unsupported Type-B I/F installed
1 3 2 0 C1320 LocalTalk I/F error
1 9 9 0 C1999 Other hardware error
EPL-5500 Service Manual Troubleshooting
Rev. B 5-5
5.3 TROUBLESHOOTING
This section describes troubleshooting abnormal operations and print quality problems.
5.3.1 Troubleshooting of Abnormal Operation
This section describes how to detect malfunctions, and determine the cause, and it suggests whatactions to take for various types of malfunctions. Each paragraph refers you to a detailedtroubleshooting table.
Table 5-4. Symptoms and Reference Tables
Symptom Printer Condition ReferenceTable
The printer does not operate at all The heater lamp in fusing unit does not come on,and so neither LED light is on.
5-5
Yellow and LED lights do not comeon
The heater lamp in the fusing unit comes on, butthe LED lights are not on.
5-6
LED light is on The LED light goes on after power on. 5-7
The LED light goes on when printing starts. 5-8
The LED light is on when printing starts from thelower paper cassette.
5-9
Paper jam. 5-10
Software error The printer indicates a software error on the statussheet.
5-11
Fusing unit error A fusing unit error is displayed. 5-12
Fan motor error A fan motor error is displayed. 5-13
Scanner motor error A scanner motor error is displayed. 5-14
Laser light error A laser light error is displayed 5-15
Communication error for engine A communication error is displayed. 5-16
EEPROM write error An EEPROM write error is displayed. 5-17
Engine initialize error An engine initialize error is displayed. 5-18
Error code C1000 or C1001 A C1000 or C1001 is displayed. 5-19
Error code C1002 A C1002 is displayed. 5-20
Error code C1003 A C1003 is displayed. 5-21
Error code C1130 A C1130 is displayed. 5-22
Error code C1170 A C1170 is displayed. 5-23
Error code C1180 A C1180 is displayed. 5-24
Error code C1300 or C1310 A C1300 or C1310 is displayed. 5-25
Error code C1320 A C1320 is displayed. 5-26
Error code C1990 A C1990 is displayed. 5-27
Troubleshooting EPL-5500 Service Manual
5-6 Rev. B
Table 5-5. The Printer Does Not Operate at All
Cause Step Checkpoint Finding Solution
Connector CN207 on theC169 MAIN-B Board may bedisconnected.
1Is connector CN207 on theC169 MAIN-B Boarddisconnected?
YesConnect CN207 onthe board.
The fuse on the PWB-E boardmay be blown.
2Has the fuse blown on thePWB-E board?
YesReplace the fuse.
PWB-E board may be dead.
3
With power on, is there anoutput of +5 VDC between pin 4(+) and pin 3 (–) for CN207 onC169 MAIN-B Board?
No
Replace the PWB-Eboard.
C169 MAIN-B Board may bedead.
4—
—Replace the C169MAIN-B Board.
Table 5-6. Both LED Lights Do Not Come On
Cause Step Checkpoint Finding Solution
The C169 MAIN-B Board maybe dead.
1If you change the C169 MAIN-BBoard, do the LEDs come on?
YesReplace the C169MAIN-B Board.
Table 5-7. The LED Does Not Come On (1)
EPL-5500 Service Manual Troubleshooting
Rev. B 5-7
Cause Step Checkpoint Finding Solution
The interlock switch lever isbad.
1Does the switch turn on whenthe case is closed?
NoReplace the interlocklever.
The interlock switch may bedead.
2Does the switch toggle?(Check with a multimeter.)
NoReplace the interlockswitch.
The PWB-E board may bedead.
3
With power on, is there anoutput of +24 VDC betweenpin 1 (+) and pin 2 (–) forCN207 on C169 MAIN-Bboard?
No
Replace the PWB-Eboard.
The paper take-up sensor flagposition may be incorrect.
4Is the paper take-up sensorflag position OK?
NoReposition the papertake-up sensor flag.
The paper exit sensor flagposition may be incorrect.
5Is the paper exit sensor flagposition OK?
NoReposition the paperexit sensor flag.
The paper take-up sensorconnector may bedisconnected.
6Is the paper take-up sensorconnector disconnected? Yes
Connect it.
The paper exit sensorconnector may bedisconnected.
7Is the paper exit sensorconnector disconnected? Yes
Connect it.
The paper exit sensor may bedead.
8—
—Replace it.
The paper take-up sensor maybe dead.
9—
—Replace it.
Troubleshooting EPL-5500 Service Manual
5-8 Rev. B
Table 5-8. The LED Does Not Come On (2)
Cause Step Checkpoint Finding Solution
The paper take-up solenoidcoil may be open or shorted.
1
Disconnect connector CN203on the C169 MAIN-B Boardand check the coil resistancebetween pin 5 and pin 6 onthe dis- connected cable sideof the connector, using amultimeter.Is the resistanceapproximately 80 ohms?
No
Replace the papertake-up solenoid.
If the coil is shorted, check thesolenoid drive circuit using theprocedure below:1. Set the multimeter for voltage.2. Place the (–) terminal of the multimeter on pin 5 of connector CN207 on the C169 MAIN-B Board.3. Place the (+) terminal of the multimeter on pin 6 (GND).With power on, does themultimeter detect any current?
Yes
Replace the papertake-up solenoid andthe C169 MAIN-BBoard.
Continued on next page
EPL-5500 Service Manual Troubleshooting
Rev. B 5-9
Table 5-8. The LED Does Not Come On (2) (Continued)
Cause Step Checkpoint Finding Solution
The main motor coil may beopen or shorted.
2
Disconnect connector CN206on the C169 MAIN-B Board,and check the coil resistancebetween: pin 1 and pin 2; pin 3and pin 4 (2 points total) on thedisconnected cable side of theconnector, using a multimeter.Pin 1 — Pin 2Pin 3 — Pin 4Are the resistances of all fourpoints approximately 10 ohms?
No
Replace the mainmotor.
If any coil is shorted, check themain motor drive circuit usingthe following procedure:1. Set the multimeter to voltage.2. Place the (–) terminal of the multimeter on pins 1, 2, 3, or 6 of connector CN206 on the C169 MAIN-B board.3. Place the (+) terminal on pin 2 of connector CN207 of the C169 MAIN-B Board (GND).With power on, does themultimeter detect current?
Yes
Replace the C169MAIN-B Board.
Paper take-up sensor flagposition may be incorrect.
3Is paper take-up sensor flagposition incorrect?
YesReseat the papertake-up sensor flag.
Paper take-up roller may bebad.
4—
—Replace the papertake-up roller.
Troubleshooting EPL-5500 Service Manual
5-10 Rev. B
Table 5-9. The LED Does Not Come On (3)
Cause Step Checkpoint Finding Solution
The standard tray hasproblems.
1Is the standard tray OK?
NoRefer to Table 5-8.
The paper take-up solenoid coilfor the lower paper cassettemay be open or shorted.
2
Disconnect junctionconnector near the solenoidand check the coil resistancebetween pin 1 and pin 2 on thedisconnected solenoid side ofthe connector, using amultimeter. Is the resistanceapproximately 80 ohms?
No
Replace the papertake-up solenoid.
If the coil is shorted, checkthe solenoid drive circuitusing the followingprocedure:1. Set the multimeter to voltage.2. Place the (–) terminal on pin of connector CN2 on the lower paper cassette board.3. Place the (+) terminal on of ground of CN1.With power on, does themultimeter detect anycurrent?
Yes
Replace the papertake-up solenoid andcircuit board of lowerpaper cassette.
The paper take-up roller in thelower paper cassette may bebad.
3—
—Replace the papertake-up roller.
EPL-5500 Service Manual Troubleshooting
Rev. B 5-11
Table 5-10. The LED Does Not Come On (4)
Cause Step Checkpoint Finding Solution
The consumables may not beinstalled.
1Are the consumables installed?
NoInstall theconsumables.
The paper take-up roller maybe bad.
2Does paper always jam in papertake-up roller area?
YesReplace the papertake-up roller.
The paper feed roller may bebad.
3Does paper always jam in thepaper feed roller area?
YesReplace the paperfeed roller.
The fusing unit may be bad.4
Does paper always jam in thefusing unit?
YesReplace it.
Table 5-11. Software Errors
Cause Step Checkpoint Finding Solution
The C169 MAIN-B Boardmay be bad.
1—
—Replace it.
Table 5-12. Fusing Unit Error
Cause Step Checkpoint Finding Solution
The connector for thethermistor may bedisconnected.
1Is the connector for thethermistor disconnected? Yes
Connect it.
The C169 MAIN-B Board maybe dead.
2Does the heater lamp remainlit up until the error occurs?
YesReplace the C169MAIN-B Board.
The heater lamp or thermalfuse in the fusing unit may bebad.
3Does the heater lamp comeon at power on? No
Replace the heaterlamp or thermal fusein the fusing unit.
The PWB-E board may bedead.
4—
—Replace the PWB-Eboard.
Table 5-13. The Fan Motor Error
Cause Step Checkpoint Finding Solution
Connector CN211 on theC169 MAIN-B Board may bedisconnected.
1Is connector CN211 on theC169 MAIN-B Boarddisconnected?
YesConnect it.
The fan motor may be dead. 2 — — Replace it.
Table 5-14. The Scanner Motor Error
Troubleshooting EPL-5500 Service Manual
5-12 Rev. B
Cause Step Checkpoint Finding Solution
The optical unit may be bad.1
——
Replace the opticalunit.
The C169 MAIN-B Board maybe bad.
2—
—Replace the C169MAIN-B Board.
EPL-5500 Service Manual Troubleshooting
Rev. B 5-13
Table 5-15. Laser Light Error
Cause Step Checkpoint Finding Solution
The optical unit may bedead.
1—
—Replace the opticalunit.
The C169 MAIN-B Boardmay be dead.
2—
—Replace the C169MAIN-B Board.
Table 5-16. Communication Error
Cause Step Checkpoint Finding Solution
The C169 MAIN-B Boardmay be bad.
1 — — Replace the C169MAIN-B Board.
Table 5-17. EEPROM Write Error
Cause Step Checkpoint Finding Solution
The EEPROM is may be bad.1
——
Replace theEEPROM.
The C169 MAIN-B Boardmay be bad.
2—
—Replace the C169MAIN-B Board.
Table 5-18. Engine Initialize Error
Cause Step Checkpoint Finding Solution
The C169 MAIN-B Boardmay be bad.
1—
—Replace the C169MAIN-B Board.
Table 5-19. C1000 or C1001 Error
Cause Step Checkpoint Finding Solution
The optional SIMM may bebad.
1Is operation OK after youremove the optional SIMM?
YesReplace the SIMM.
The C169 MAIN-B Boardmay be bad.
2—
—Replace the C169MAIN-B Board.
Table 5-20. C1002 Error
Cause Step Checkpoint Finding Solution
The C169 MAIN-B Boardmay be bad.
1—
—Replace the C169MAIN-B Board.
Troubleshooting EPL-5500 Service Manual
5-14 Rev. B
Table 5-21. C1003 Error
Cause Step Checkpoint Finding Solution
The optional SIMM may bebad. 1
Is the operation OK afteryou remove the optionalSIMM?
YesReplace the SIMM.
The C169 MAIN-B Boardmay be bad.
2—
—Replace the C169MAIN-B Board.
Table 5-22. C1130 Error
Cause Step Checkpoint Finding Solution
The program ROMs on theC169 MAIN-B Board may bebad.
1Is operation OK after youreplace the ROM? —
Replace the programROMs on the C169MAIN-B Board.
The C169 MAIN-B Board maybe bad.
2—
—Replace the C169MAIN-B Board.
Table 5-23. C1170 Error
Cause Step Checkpoint Finding Solution
The ROM (IC11) on the C169MAIN-B Board may be bad. 1
Is operation OK after youreplace the ROM? —
Replace the ROM (IC11)on the C169 MAIN-BBoard.
The C169 MAIN-B Board maybe bad.
2—
—Replace the C169MAIN-B Board.
Table 5-24. C1180 Error
Cause Step Checkpoint Finding Solution
The ROM SIMM may be bad.1
Is operation OK after youreplace the ROM SIMM?
—Replace the ROMSIMM.
The C169 MAIN-B Board maybe bad.
2—
—Replace the C169MAIN-B Board.
Table 5-25. C1300 or C1310 Error
Cause Step Checkpoint Finding Solution
The optional interface card(Type-B) may be bad. 1
——
Replace the optionalinterface card or Type-BEX box.
The C169 MAIN-B Board maybe bad.
2—
—Replace the C169MAIN-B Board.
EPL-5500 Service Manual Troubleshooting
Rev. B 5-15
Table 5-26. C1320 Error
Cause Step Checkpoint Finding Solution
The optional interface cardmay be bad.
1—
—Replace the optionalinterface card.
The C169 MAIN-B Board maybe bad.
2—
—Replace the C169MAIN-B Board.
Table 5-27. C1990 Error
Cause Step Checkpoint Finding Solution
The C169 MAIN-B Board maybe bad.
1 — — Replace the C169MAIN-B Board.
Troubleshooting EPL-5500 Service Manual
5-16 Rev. B
5.4.2 Print Quality Anomalies
This section describes how to isolate possible causes of a print quality problem .
Table 5-28. Print Quality Anomalies
Symptom Possible Cause Part Name Check Item Remedy
Low image density Poor development PWB-F board — Replace the PWB-Fboard.
Image transferproblem
Image transferunit
Check to see if thesurface of imagetransfer unit isdamaged.
Replace the imagetransfer unit.
PWB-F board — Replace the PWB-Fboard.
Defective PC drum Photoconduc-tor unit
— Replace thephotoconductor unit.
Improper printdensity setting
— — Adjust the print densityusing printer settings.
Foggy background Poor development Toner cartridge — Replace the tonercartridge.
Improper charging Drum charge — Replace the PWB-Fboard.
Check the wiring of thePC drum charging biasline.
Replace thephotoconductor unit.
Improper printdensity setting
— — Adjust the print densityin printer settings.
EPL-5500 Service Manual Troubleshooting
Rev. B 5-17
Table 5-28. Print Quality Anomalies (Continued)
Symptom Possible Cause Part Name Check Item Remedy
Blank print Poor development Imagingcartridge
Check whether thetoner cartridge isinstalled properly.
Reinstall the tonercartridge.
PWB-F board — Replace the PWB-Fboard.
Improper charging PWB-F board — Replace the PWB-Fboard.
Poor imagetransfer
Image transferunit
Check the surface ofthe image transfer unit.
Replace the imagetransfer unit.
PWB-F board — Replace the PWB-Fboard.
Improper printdensity setting
— — Adjust the print densityin SelecType.
Defective opticalunit
Optical unit — Replace the optical unit.
Black print Improper charging Photoconduc-tor unit
— Replace thephotoconductor unit.
PWB-F board — Replace the PWB-Fboard.
Poor development Toner cartridge — Replace the tonercartridge.
PWB-F board Replace the PWB-Fboard.
Improper printdensity setting
— — Adjust the print densityin SelecType
Defective opticalunit
Optical unit — Replace the optical unit.
White/black lines andbands.
Improper charging Photoconduc-tor unit
— Replace the imagingcartridge.
Poor development PWB-F board — Replace the PWB-Fboard.
Toner cartridge — Replace the tonercartridge.
Dirt on the fusingroller
Fusing roller — Clean the fusing roller.
Troubleshooting EPL-5500 Service Manual
5-18 Rev. B
Table 5-28. Print Quality Anomalies (Continued)
Symptom Possible Cause Part Name Check Item Remedy
Toner smudges onthe back side of thesheet.
Improper charging PWB-F — Replace the PWB-Fboard.
Poor development PWB-F — Replace the PWB-Fboard.
Improper fusing Fusing unit — Replace the fusing unit.
Offset print Improper fusing Fusing unit — Replace the fusing unit.
White spots Poor imagetransfer
Image transferunit
— Replace the imagetransfer unit.
PWB-F — Replace the PWB-Fboard.
EPL-5500 Service Manual Troubleshooting
Rev. B 5-19
Chapter 6 Maintenance
Table of Contents
6.1 MAINTENANCE 6-16.1.1 User Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.1.1.1 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16.1.1.2 Replacement of Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
6.1.2 Service Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26.1.2.1 Periodic Service Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26.1.2.2 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
List of Figures
Figure 6-1. Position of the Special Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1Figure 6-2. Cleaning the Electrode Comb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
List of Tables
Table 6-1. Periodic Service Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2Table 6-2. Cleaning Parts and Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
6-ii Rev. A
6.1 MAINTENANCE
The EPL-5500 is a page printer that uses an electrophotographic printing method. Unlike mostimpact or ink-jet printers, the key components in the electrophotographic process are integrated intotwo expendable units (the photoconductor unit and toner cartridge). Therefore, periodicreplacement of them is essential to ensure high-quality output. Other maintenance items are alsodescribed in this chapter, which is divided into two sections: user maintenance (preventivemaintenance) and service maintenance (repair).
6.1.1 User Maintenance
Users can achieve maximum print quality from the printer by following the procedures below:
6.1.1.1 Cleaning
This section describes the cleaning required for optimal print quality.
❒ External Cleaning
Be sure to disconnect the printer from the power outlet before cleaning it. Wipe the cover andexternal parts of the printer with a damp cloth that has been soaked in a neutral cleaning solution.
❒ Internal Cleaning
Be sure the printer has been disconnected from the power supply and that the fusing unit hascooled down. If the electrode comb of the image transfer unit is dirty, clean it with a special tool,using the following steps:
1. Pick up the electrode comb cleaner from the upper unit.
2. Wipe the electrode comb surface from end to end with the electrode comb cleaner severaltimes.
Figure 6-1. Position of the Special Tool
Electrode Comb Cleaner
Cleaner section
Pre-image Transfer Roller
Image Transfer RearGuide
Figure 6-2. Cleaning the Electrode Comb
EPL-5500 Service Manual Maintenance
Rev. B 6-1
6.1.1.2 Replacement of Consumables
This printer uses a consumable photoconductor unit and toner cartridge. The life of photoconductorunit is 20,000 pages and the toner cartridge life is 3,000 pages, when printing on A4- or letter-sizepages with a 5% print ratio.
If printed images become faint, remove the toner cartridge and gently shake it. This will distributethe toner and may make the images darker. If the image is still too light, replace the toner cartridgecartridge.
If the printed image remains faint after you have replaced the toner cartridge, change the photo-conductor unit.
6.1.2 Service Maintenance
This section describes the periodic service maintenance and the cleaning required.
6.1.2.1 Periodic Service Maintenance
The following units need service maintenance periodically, because they are subject to functionaldeterioration as the total number of printed pages increases, resulting in bad print quality.
Table 6-1. Periodic Service Maintenance
Unit Service Interval
Image transfer unit Approx. 50,000 pages
Fusing unit Approx. 50,000 pages
The service interval listed above is only a reference value. You do not need to perform servicemaintenance exactly at this time.
6.1.2.2 Cleaning
Some parts of this printer require regular cleaning. Clean each part using the specified method andtools. (Refer to Chapter 3 for disassembly procedures.)
Table 6-2. Cleaning Parts and Procedures
Parts Name Cleaning Procedure
Paper take-up roller Wipe the surface with a dry soft cloth.
Upper fusing roller (in fusing unit) Dip a soft cloth in silicon oil and wipe the dust off.
Lower fusing roller (in fusing unit)
Thermistor (in fusing unit) Dip a soft cloth in denatured alcohol and wipe thedust off.
Paper separator and rollers (in fusing unit)
Maintenance EPL-5500 Service Manual
6-2 Rev. B
EPL-5500 Service Manual Maintenance
Rev. B 6-3
Appendix A Reference Materials
Table of Contents
A.1 CONNECTOR PIN ASSIGNMENTS A-1A.1.1 Main Board (C169 MAIN-B Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
A.2 CIRCUIT DIAGRAM A-11
A.3 CIRCUIT BOARD COMPONENT LAYOUT A-16
List of Figures
Figure A-1. Cable Connections for the Video Controller . . . . . . . . . . . . . . . . . . A-1Figure A-2. Cable Connections for the Engine Controller . . . . . . . . . . . . . . . . . A-2Figure A-3. C169 MAIN-B Circuit Diagram (1/2) . . . . . . . . . . . . . . . . . . . . . . . A-11Figure A-4. C169 MAIN-B Circuit Diagram (2/2) . . . . . . . . . . . . . . . . . . . . . . . A-13Figure A-5. PWB-E (120V) Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . A-14Figure A-6. PWB-E (220/240V) Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . A-15Figure A-7. C169 MAIN-B Component Layout (Front) . . . . . . . . . . . . . . . . . . . A-16Figure A-8. C169 MAIN-B Component Layout (Rear) . . . . . . . . . . . . . . . . . . . A-17
List of Tables
Table A-1. Board Connector Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3Table A-2. CN2 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4Table A-3. CN4 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5Table A-4. CN5 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7Table A-5. CN202 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8Table A-6. CN203 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8Table A-7. CN204 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9Table A-8. CN205 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9Table A-9. CN206 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9Table A-10. CN207 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9Table A-11. CN208 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9Table A-12. CN209 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10Table A-13. CN210 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10Table A-14. CN211 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10
A.1 CONNECTOR PIN ASSIGNMENTS
Figures A-1 and A-2 illustrate the interconnection of the primary components. Table A-1 gives thesize and a description of each connector.
CN1
Parallel I/F
CN2
RAM SIMM
CN4LocalTalk/Serial I/Fmodule or Type-B EX
ROM SIMM CN5
C169 MAIN-B BoadVideo Controller Section
Figure A-1. Connections for the Video Controller
EPL-5500 Service Manual Appendix
Rev. A A-1
1234
M 1
Main motor
5432
M 2
Polygon motor
1234
1
C N 1 M
CN206ϕAϕAϕBϕB
POLYGON CTLDC 5VG N DD C2 4VN.C.
12
M 3
Fan motor CN211F A ND C2 4V
CN2 10
1231
23C N3 S
ANODE(PC1)G N DP C3
PC 3
CN2 08Paper Exit sensor
1231
23C N1 S
ANODE (PC1)G N DP C1
PC 1
CN2 03Paper Take-up sensor
456
N.C.D C24VFEE D1
SL 1 121
2
Paper Take-upsolenoid
CN2S
Fusing rollerThermistor
TH 112
THERMOSTORDC5V
CN202
123
HV CHV THV SEL1
456
HV SEL2HV BBIAS MON
78
12345678
P WB -S87654321
CN204
P WB -F
Highvoltageunit
87654321
GN DDC24V
CN1F
Imagetransferhousing
Imagetransfercharger
123
DC24VFEE D2N.C.
456
DC5VG N DP EMP2
78
PSIZE02NDBIN
91 0
mm/inchUNIVERSAL
1 18
CH EC K1
P WB -A87654321
C N1 A
1211109
CN2 09
12
SL2
Paper Take-upsolenoid
D C24VFE ED 2
2nd paper feedingunit (option)
CHECK 2
7654321
1234567
P WB -D
CN205 CN1D
Laser diodedrive board
12345
12345
DC5VL DATA
G N DLD APC1 (LDVR1)LD APC1 (LDVR2)
C O
S SCAN
CN2 07
PWB -E
123
H 1
TF 1
Fusing rol lerheater lamp
Fusing rol ler thermal fuse
CN1EC N3 E
DC24VGNDGND
D C5 V
FUSE R LA MP
Inter lockswitch
Inletboard
Power S W
Inlet
Powerunit
HEAT NN.C.
HEA T L
C169 MAIN-BBoard
Figure A-2. Cable Connections for the Engine Controller
Appendix EPL-5500 Service Manual
A-2 Rev. A
Table A-1. Board Connector Summary
Connector Description Pins Reference
Main Board (C169 MAIN-B Board)
CN1 Centronics parallel interface 36 pins Table 1-8
CN2 Connector for RAM SIMM 72 pins Table A-2
CN3 (Not used) 20 pins —
CN4 Connector for LocalTalk/Serial I/F Module or Type-B EX 60 pins Table A-3
CN5 Connector for ROM SIMM 72 pins Table A-4
CN6 (Not used) 80 pins —
CN7 (Not used) 40 pins —
CN202 Connector for thermistor 2 pins Table A-5
CN203 Connector for paper take-up solenoid and paper take-up sensor 6 pins Table A-6
CN204Connector for high-voltage supply board (PWB-S and PWB-Fboard)
8 pins Table A-7
CN205 Connector for optical unit 7 pins Table A-8
CN206 Connector for motor 4 pins Table A-9
CN207 Connector for power supply board (PWB-E board) 5 pins Table A-10
CN208 Connector for paper exit sensor 3 pins Table A-11
CN209 Connector for lower paper cassette 12 pins Table A-12
CN210 Connector for optical unit 5 pins Table A-13
CN211 Connector for fan 2 pins Table A-14
Power Supply Board (PWB-E Board)
CN1 Connector for AC power inlet 4 pins —
CN2 Connector for main board 5 pin Table A-11
CN3 Connector for heater lamp 3 pins —
High-Voltage Supply Board (PWB-F Board)
CN1 Connector for main board 8 pins Table A-7
CN2 Connector for paper take-up sensor 3 pins —
EPL-5500 Service Manual Appendix
Rev. A A-3
A.1.1 Main Board (C169 MAIN-B Board)
Table A-2. CN2 Pin Assignments
Pin No. Signal Name I/O Description1 Vss — Ground2 DQ0 I/O Data bus bit 03 DQ16 I/O Data bus bit 164 DQ1 I/O Data bus bit 1
5 DQ17 I/O Data bus bit 17
6 DQ2 I/O Data bus bit 27 DQ18 I/O Data bus bit 188 DQ3 I/O Data bus bit 39 DQ19 I/O Data bus bit 19
10 Vcc — +5 VDC11 NC — Not connected12 MA0 O Memory address bit 0
13 MA1 O Memory address bit 1
14 MA2 O Memory address bit 215 MA3 O Memory address bit 316 MA4 O Memory address bit 417 MA5 O Memory address bit 518 MA6 O Memory address bit 619 MA10 O Memory address bit 1020 DQ4 I/O Data bus bit 4
21 DQ20 I/O Data bus bit 20
22 DQ5 I/O Data bus bit 523 DQ21 I/O Data bus bit 2124 DQ6 I/O Data bus bit 625 DQ22 I/O Data bus bit 2226 DQ7 I/O Data bus bit 727 DQ23 I/O Data bus bit 2328 MA7 O Memory address bit 7
29 NC — Not connected
30 Vcc — +5 VDC31 MA8 O Memory address bit 832 MA9 O Memory address bit 933 RAS3 O RAS 334 RAS2 O RAS 235 MP2 — Not used36 MP0 — Not used
37 MP1 — Not used
38 MP3 — Not used39 Vss — Ground40 CAS0 O CAS 041 CAS2 O CAS 242 CAS3 O CAS 343 CAS1 O CAS 144 RAS0 O RAS 0
45 RAS1 O RAS 1
46 NC — Not connected47 WE O Write enable48 NC — Not connected49 DQ8 I/O Data bus bit 8
Appendix EPL-5500 Service Manual
A-4 Rev. A
Table A-2. CN2 Pin Assignments (Continued)
Pin No. Signal Name I/O Description50 DQ24 I/O Data bus bit 2451 DQ9 I/O Data bus bit 952 DQ25 I/O Data bus bit 2553 DQ10 I/O Data bus bit 1054 DQ26 I/O Data bus bit 2655 DQ11 I/O Data bus bit 11
56 DQ27 I/O Data bus bit 27
57 DQ12 I/O Data bus bit 1258 DQ28 I/O Data bus bit 2859 Vcc — +5 VDC60 DQ29 I/O Data bus bit 2961 DQ13 I/O Data bus bit 1362 DQ30 I/O Data bus bit 3063 DQ14 I/O Data bus bit 14
64 DQ31 I/O Data bus bit 31
65 DQ14 I/O Data bus bit 1466 NC — Not connected67 PO1 — Not used68 PO2 — Not used69 PO3 — Not used70 PO4 — Not used71 NC — Not connected
72 Vss — Ground
Table A-3. CN4 Pin Assignments
Pin No. Signal Name I/O Description1 PCLK O Clock
2 RST O Reset signal
3 GND — Ground4 GND — Ground5 GND — Ground6 GND — Ground7 DB0 I/O Data bus bit 08 DB1 I/O Data bus bit 19 DB2 I/O Data bus bit 2
10 DB3 I/O Data bus bit 3
11 DB4 I/O Data bus bit 412 DB5 I/O Data bus bit 513 DB6 I/O Data bus bit 614 DB7 I/O Data bus bit 715 AB0 O Address bus bit 016 AB1 O Address bus bit 117 AB2 O Address bus bit 2
18 AB3 O Address bus bit 3
19 AB4 O Address bus bit 420 CS O Select signal
EPL-5500 Service Manual Appendix
Rev. A A-5
Table A-3. CN4 Pin Assignments (Continued)
Pin No. Signal Name I/O Description21 RD O Read strobe signal
22 WR O Write strobe signal
23 IREQ O Interrupt to option
24 NMI O Non-maskable interrupt25 DREQ O Data request26 DTCT I LT option used/unused27 VCC — +5 VDC28 VCC — +5 VDC29 VCC — +5 VDC
30 VCC — +5 VDC
31 TXD+ — Not used
32 TXD- — Not used33 RXD+ — Not used34 RXD- — Not used35 DTR — Not used36 CTS — Not used37 NC — Not used
38 NC — Not used
39 LCD — Not used
40 SWRD — Not used41 GND — Ground42 GND — Ground43 GND — Ground44 GND — Ground45 RESET O Reset signal
46 INH O I/F disabled
47 CMREQ I Request command
48 WRRDY I I/F ready49 RDREQ I Data read request50 WRT O Write enable51 RDT O Read enable52 TYPB I Type-B I/F used/unused53 TXD — Not used
54 READY — Not used
55 RXD — Not used
56 NC — Not connected57 VCC — +5 VDC58 VCC — +5 VDC59 VCC — +5 VDC60 VCC — +5 VDC
Appendix EPL-5500 Service Manual
A-6 Rev. A
Table A-4. CN5 Pin Assignments
Pin No. Signal Name I/O Description1 Vss — Ground2 D0 I/O Data bus bit 03 D16 I/O Data bus bit 164 D1 I/O Data bus bit 15 D17 I/O Data bus bit 176 D2 I/O Data bus bit 2
7 D18 I/O Data bus bit 18
8 D3 I/O Data bus bit 39 D19 I/O Data bus bit 19
10 Vcc — +5 VDC11 RD O Read strobe12 A0 O Address bit 013 A1 O Address bit 114 A2 O Address bit 2
15 A3 O Address bit 3
16 A4 O Address bit 417 A5 O Address bit 518 A6 O Address bit 619 A10 O Address bit 1020 D4 I/O Data bus bit 421 D20 I/O Data bus bit 2022 D5 I/O Data bus bit 5
23 D21 I/O Data bus bit 21
24 D6 I/O Data bus bit 625 D22 I/O Data bus bit 2226 D7 I/O Data bus bit 727 D23 I/O Data bus bit 2328 A7 O Address bit 729 A19 O Address bit 1930 Vcc — +5 VDC
31 A8 O Address bit 8
32 A9 O Address bit 933 A20 O Address bit 2034 EEP O Chip select35 RESET O Reset signal36 A21 O Address bit 2137 A22 O Address bit 2238 A23 O Address bit 23
39 Vss — Ground
40 A11 O Address bit 1141 A13 O Address bit 1342 A14 O Address bit 1443 A12 O Address bit 1244 CS0 O Chip select45 CS1 O Chip select46 A18 O Address bit 18
47 WR O Write enable
48 A17 O Address bit 1749 D8 I/O Data bus bit 8
EPL-5500 Service Manual Appendix
Rev. A A-7
Table A-4. CN5 Pin Assignments (Continued)
Pin No. Signal Name I/O Description50 D24 I/O Data bus bit 2451 D9 I/O Data bus bit 952 D25 I/O Data bus bit 2553 D10 I/O Data bus bit 1054 D26 I/O Data bus bit 2655 D11 I/O Data bus bit 11
56 D27 I/O Data bus bit 27
57 D12 I/O Data bus bit 1258 D28 I/O Data bus bit 2859 Vcc — +5 VDC60 D29 I/O Data bus bit 2961 D13 I/O Data bus bit 1362 D30 I/O Data bus bit 3063 D14 I/O Data bus bit 14
64 D31 I/O Data bus bit 31
65 D14 I/O Data bus bit 1466 A16 O Address bit 767 R/B — Not used68 NC — Not connected69 NC — Not connected70 NC — Not connected71 A15 O Address bit 15
72 Vss — Ground
Table A-5. CN202 Pin Assignments
Pin No. Signal Name I/O Description1 +5 — +5 VDC
2 TH I Fuser temperature
Table A-6. CN203 Pin Assignments
Pin No. Signal Name I/O Description1 PS1 I Paper take-up sensor
2 GND1 — Ground
3 PS1 I Paper take-up sensor4 NC — No connected5 +24V — +24 VDC6 FEED1 O Paper take-up solenoid drive
Appendix EPL-5500 Service Manual
A-8 Rev. A
Table A-7. CN204 Pin Assignments
Pin No. Signal Name I/O Description1 HV-C —2 HV-T I3 HV-S —4 HV-S2 —5 HV-B6 BIAS-M O7 GND2 — Ground
8 +24 — +24 VDC
Table A-8. CN205 Pin Assignments
Pin No. Signal Name I/O Description1 SSCAN I Horizontal synchronous signal
2 LD-CTL I Laser power signal3 LDAPC2 O Laser power adjust 24 LDAPC1 O Laser power adjust 15 GND1 — Ground6 LDATA O Laser data7 +5V — +5 VDC
Table A-9. CN206 Pin Assignments
Pin No. Signal Name I/O Description1 A O Motor phase A2 A O Motor phase A3 B O Motor phase B
4 B O Motor phase B
Table A-10. CN207 Pin Assignments
Pin No. Signal Name I/O Description1 +24V — +24 VDC
2 GND2 — Ground
3 GND1 — Ground
4 +5V — +5 VDC5 FUSER O Heater lamp on
Table A-11. CN208 Pin Assignments
Pin No. Signal Name I/O Description1 PS3 I Paper exit sensor (+5V)2 GND — Ground3 PS3 I Paper exit sensor (SGL)
EPL-5500 Service Manual Appendix
Rev. A A-9
Table A-12. CN209 Pin Assignments
Pin No. Signal Name I/O Description1 +24 V — +24 VDC2 FEED2 O Lower cassette solenoid on3 NC — No connected4 +5V — +5 VDC5 GND1 — Ground6 PE2 I Lower cassette paper empty
7 PSIZ0
8 PSIZ19 PSIZE2
10 CHECK111 CHECK212 CHECK3
Table A-13. CN210 Pin Assignments
Pin No. Signal Name I/O Description1 NC — Not connected
2 +24V — +24 VDC3 GND2 — Ground4 +5V — +5 VDC5 P-CTL O Polygon motor control
Table A-14. CN211 Pin Assignments
Pin No. Signal Name I/O Description1 +24V — +24 VDC2 FAN O Fan control
Appendix EPL-5500 Service Manual
A-10 Rev. A
A.2 CIRCUIT DIAGRAMS 16 19 20 21 22 23 24 25 26 27 28 29 30 33
2 3 4 5 6 7 8 9
1 36 14 31
10 11 12 13 32
35 17 15 18 34
CN1
PIF
R8 1K
R29 1K
1 2 3 4
8 7 6 5
RM7
100
C26470P
C27470P
C28470P
C29470P
1
2
3
4
8
7
6
5
RM81K
1 2 3 4
8 7 6 5
RM5 1K
DATA1DATA2DATA3DATA4DATA5DATA6DATA7DATA8
STRBX
ACKX
AUTOXSELINX
INITX
1 2 3 4
8 7 6 5
RM1
68
1 2 3 4
8 7 6 5
RM2
68
1
2
3
4
8
7
6
5
RM101K
1
2
3
4
8
7
6
5
RM91K
R1110K
1
2
3
4
8
7
6
5
RM610K AD0 34
AD1 33AD2 32AD3 31AD4 30AD5 29AD6 28AD7 27
CE 55RW 56READY 57
IRL0 40IRL1 39IRL2 38IRL3 37
MCLK 53RESET 54
PIRDY 41SIRDY 42TBRDY 43SCRDY 44
OPTI0 49OPTI1 48OPTI2 47OPTI3 46OPTI4 45NMI 50
EXRD102EXWR101
EXIN0 2EXIN1 1EXIN2128EXIN3127
CTSL 69N.C. 63N.C. 64N.C. 65N.C. 66N.C. 70
VCC 4VCC 13VCC 26VCC 35VCC 52VCC 68VCC 77VCC 90VCC 99VCC115
GND 3GND 14GND 25GND 36GND 51GND 67GND 78GND 89GND100GND116
TEST0 62TEST1 61
DATA1 98DATA2 97DATA3 96DATA4 95DATA5 94DATA6 93DATA7 92DATA8 91
DIR 88STRB 80
SELIN 81AUTO 82INIT 79
ACK 87BUSY 86
PE 85SELOT 83
ERR 84
TXD 76RXD 73RTS 75CTS 72
SRXD 74BCLK 71
EPRDY 121CPRDY 112PRRDY 120PRINT 111
PRFD 110ETBSY 119CTBSY 113SRCLK 114
STS 118CMD 117
VSREQ 122
LCD 20LED 21
SWRD 22LCLK 23
SWINT 126BZ 24
TYPB 108RDT 107WRT 106INH 109
RDREQ 123WRRDY 124CMREQ 125
EXTOUT0 60EXTOUT1 59EXTOUT2 58
EXT 105RDE 104WRE 103
DB0 12DB1 11DB2 10DB3 9DB4 8DB5 7DB6 6DB7 5
AB0 19AB1 18AB2 17AB3 16AB4 15
IC4
E05A93AA
AD0AD1AD2AD3AD4AD5AD6AD7
R26
10KR27
10K
TP1TP
AD0AD1AD2AD3AD4AD5AD6AD7
AD[0..7]
D0 2D1 3D2 4D3 5D4 6D5 7D6 8D7 9D8 12D9 13D10 14D11 15D12 16D13 17D14 18D15 19D16 22D17 23D18 24D19 25D20 26D21 27D22 28D23 29D24 32D25 33D26 34D27 35D28 36D29 37D30 38D31 39
A2 48A3 49A4 50A5 51A6 52A7 53A8 54A9 55A10 56A11 57A12 58A13 59A14 60A15 61A16 62A17 63A18 64A19 65A20 66A21 67A22 68A23 69A24 70A25 88
A28 89A29 90A30 91A31 92
BE0 71BE1 72BE2 73BE3 74
AS 93RD/WR 94READY116TMR_OV 75LOCK 95
BREQ118BGRNT 45
MCLK 46RESET 47
EXBREQ 87EXBGRNT117RDYIN 78
RD123WR124EEP115
TEST0 76TEST1 77
AD0 97AD1 98AD2 99AD3 102AD4 103AD5 104AD6 105AD7 106
IOALE 126IOR/W 125IORDY 86
IOREQA 82IOREQB 83IOREQC 84IOREQD 85
EOP 96DMAIREQ 119
VDCSA 140VDREQA 43VDREQB 44
VDDMA 141VDDMB 142
VDNULL 143VDEOL 144
CAS0 110CAS1 111CAS2 112CAS3 113
RAS0 154RAS1 155RAS2 156RAS3 157RAS4 158
DWE 139
MA0 127MA1 128MA2 129MA3 130MA4 131MA5 134MA6 135MA7 136MA8 137MA9 138
MA10 150
ICG 149ICDS 147ICRW 152ICM1 153ICM0 151ICA1 148
VDD 1VDD 10VDD 20VDD 30VDD 40VDD 81VDD 100VDD 108VDD 114VDD 120VDD 132VDD 145
VSS 11VSS 21VSS 31VSS 41VSS 42VSS 79VSS 80VSS 101VSS 107VSS 109VSS 121VSS 122VSS 133VSS 146VSS 159VSS 160
IC2
E05A91KA
R30 10K
R31
10K
R69 10KR70 10KR108 10K
A[2..27]
IRL[0..3]
DR0DR1DR2DR3DR4DR5DR6DR7DR8DR9DR10DR11
D0 85D1 84D2 83D3 82D4 81D5 80D6 78D7 73D8 72D9 71D10 70D11 69D12 65D13 64D14 62D15 61D16 59D17 58D18 55D19 54D20 53D21 50D22 47D23 46D24 45D25 44D26 43D27 41D28 40D29 35D30 34D31 31
A2 155A3 156A4 157A5 158A6 159A7 160A8 1A9 2A10 3A11 4A12 5A13 8A14 9A15 10A16 11A17 13A18 14A19 16A20 17A21 19A22 22A23 24A24 25A25 26A26 29A27 30
BE0 121BE1 123BE2 124BE3 125
ASI0 126ASI1 127ASI2 128ASI3 129
CS0 100CS1 102CS2 103CS3 104CS4 106CS5 107
IRL0 146IRL1 147IRL2 148IRL3 149
AS 91RD/WR 92READY 89
SAMEPG 99TMR_OV 120
LOCK 93ERROR 96
MEXC 88BREQ 90
BGRNT 94
XTAL1 115XTAL2 112
CLKOUT1 116CLKOUT2 117
RESET 134
RAS0 68RAS1 130
CAS0 12CAS1 15CAS2 18CAS3 23
DWE 95
VCC 6VCC 20VCC 28VCC 32VCC 37VCC 38VCC 49VCC 52VCC 63VCC 66VCC 74VCC 76VCC 87VCC 98VCC101VCC109VCC111VCC118VCC132VCC135VCC139VCC144VCC151VCC154
VSS 7 VSS 21 VSS 27 VSS 33 VSS 36 VSS 39 VSS 48 VSS 51 VSS 56 VSS 67 VSS 75 VSS 77 VSS 79 VSS 86 VSS 97 VSS105 VSS110 VSS114 VSS119 VSS131 VSS136 VSS138 VSS145 VSS150 VSS153
N.C. 42N.C. 57N.C. 60N.C.122N.C.141
BMODE8137BMODE16140
TMS143TRST133TCK108TDI142TDO152CLK_ECB113
IC1
MB86933H
D0D1D2D3D4D5D6D7D8D9D10D11
A24A25A26A21
C20.1U
R111 68R112 68R113 68R114 68R115 68R116 68R117 68R118 68R119 68R120 68R121 68R122 68R123 68R124 68R125 68R126 68R127 68R128 68R129 68R130 68
C30.1U
C40.1UC470.1U
C480.1U
D12D13D14D15D16D17D18D19D20D21D22D23D24D25D26D27D28D29D30D31
A3A4A5A6A7A8A9A10A11A12A13A14A15A16A17A18A19A20
A2
D 2
CP 3Q 5
Q 6
S
4
R 1
IC8A
74F74
R28
68
R71
10K
A2A3A4A5A6A7A8A9A10A11A12A13A14A15A16A17A18A19A20
DR12DR13DR14DR15DR16DR17DR18DR19DR20DR21DR22DR23DR24DR25DR26DR27DR28DR29DR30DR31
R3
10K
1 2 3 4
8 7 6 5
RM13
68
1 2 3 4
8 7 6 5
RM3
27
1 2 3 4
8 7 6 5
RM4
27
R22 33R23 33R24 33R25 33
MA0MA1MA2MA3
MA4MA5MA6
DQ0 2DQ1 4DQ2 6DQ3 8DQ4 20DQ5 22DQ6 24DQ7 26DQ8 49DQ9 51DQ10 53DQ11 55DQ12 57DQ13 61DQ14 63DQ15 65DQ16 3DQ17 5DQ18 7DQ19 9DQ20 21DQ21 23DQ22 25DQ23 27DQ24 50DQ25 52DQ26 54DQ27 56DQ28 58DQ29 60DQ30 62DQ31 64
MP0 36MP1 37MP2 35MP3 38
A0 12A1 13A2 14A3 15A4 16A5 17A6 18A7 28A8 31A9 32A10 19
N.C. 11N.C. 29N.C. 46N.C. 48N.C. 66N.C. 71
CAS0 40CAS1 43CAS2 41CAS3 42
RAS0 44RAS1 45RAS2 34RAS3 33
WE 47
VCC 10VCC 30VCC 59
VSS 1VSS 39VSS 72
PD1 67PD2 68PD3 69PD4 70
CN2
SIMM/72PIN
R59 10KR60 10K
J20 J
J21 J
DR0DR1DR2DR3DR4DR5DR6DR7DR8DR9DR10DR11DR12
R4
91R5
91
IRL0IRL1IRL2IRL3
TP2
TP
C10
0.1U
C14
0.1U
R12 100
R13 100
R14 100
R15 100
R16 100
13 12
IC7F
74LS07
11 10
IC7E
74LS07 9 8
IC7D
74LS07 5 6
IC7C
74LS07 3 4
IC7B
74LS07 1 2
IC7A
74LS07
BUSYPESELOTERRX
+5VCGN.C.N.C.N.C.
IC7-7 IC7-14
EPRDY 5CPRDY 13PRRDY 4PRINT 11ETBSY 7CTBSY 10SRCLK 12STS 8CMD 9TOD 6HSYNC 3VIDEO 14
RESET 2DOTCLK 1
+5 16+5 18+5 20
GND 15GND 17GND 19
CN3
EIF
R39 3.3K
R40 68
R41 68
R42 68
R43 68
C32 100P
C33 100P
C34 100P
C35 100P
C36 100P
C37 100P
R61 3.3K
R62 3.3K
R63 3.3K
R64 3.3K
R65 3.3K
DB[0..7]A
B[0..4]
J11 PJ
J12 PJ
J13 PJJ14 PJ
J15 PJ
C110.1U
D0 2D1 3D2 4D3 5D4 6D5 7D6 8D7 9D8 12D9 13D10 14D11 15D12 16D13 17D14 18D15 19D16 22D17 23D18 24D19 25D20 26D21 27D22 28D23 29D24 32D25 33D26 34D27 35D28 36D29 37D30 38D31 39
A0 53A1 54A2 55A3 56A4 57A5 58A6 59A7 60
R/W 62READY 70
CS 61DMAREQ0 44DMAREQ1 45DMAMOD0 67DMAMOD1 68DNULL 69EOL 63
RSTOUT 43RSTIN 46
MCLK 52VCLKIN 79CLK12 66CLK14 47CLK18 48CLK16 88
HSOUT 86VSYNC 87SDIN 42CLKOUT 49
PRINT 75VSREQ 77HSYNC 76
VDOOUT 89
RTST0 92RTST1 93RTST2 94RTST3 95RTST4 96RTST5 97RTST6 98RTST7 99
RCHK0 82RCHK1 83RCHK2 84RCHK3 85
TEST1 71TEST2 72TEST3 73TEST4 74
VDD 10VDD 20VDD 31VDD 41VDD 50VDD 64VDD 81VDD 91VDD 100
VSS 1VSS 11VSS 21VSS 30VSS 40VSS 51VSS 65VSS 78VSS 80VSS 90
IC3
E05A92KA
C15
0.1U
DB0DB1DB2DB3DB4DB5DB6DB7
DR0DR1DR2DR3DR4
R149 68
R146 68R147 68R148 68
R150 68
AB0AB1AB2AB3AB4
MA0MA1MA2MA3MA4MA5MA6MA7MA8MA9MA10
DR13DR14DR15DR16DR17DR18DR19DR20DR21DR22DR23DR24DR25DR26DR27DR28DR29DR30DR31
R18 27
R19 22
R20 27R21 27
4
5 6
IC23B
74AS08
12
1311
IC23D
74AS08
9
10 8
IC23C
74AS08
+5 14
GND 7
IC23
VCC_GNDC510.1U
MA7
MA8MA9MA10
C50.1U
C60.1U
C170.1U
C430.1U
A0 10A1 9A2 8A3 7A4 6A5 5A6 4A7 3A8 41A9 40A10 39A11 38A12 37A13 36A14 35A15 34A16 33A17 2A18 1N.C. 42
CE 11OE 13W/B/V 32
O0 14O1 16O2 18O3 20O4 23O5 25O6 27O7 29O8 15O9 17O10 19O11 21O12 24O13 26O14 28O15 30
VDD 22
GND 12GND 31
IC12
EPROM8M*16
1
3
2
J25J/3
1
2
3
IC23A74AS08
R14568
A2A3A4A5A6A7A8A9A10A11A12A13A14A15A16A17A18A19A20
Local Language
DR0DR1DR2DR3DR4DR5DR6DR7DR8DR9DR10DR11DR12DR13DR14DR15
R34
10K
R35
10K
R36
68
R37
68
1 2 3 4
8 7 6 5
RM12
10K
1 2 3 4
8 7 6 5
RM11
68R110
68
R109
68
R143 68R144 68
A21A22A23A24A25
A26
R131 68R132 68R133 68R134 68R135 68R136 68
R137 68R138 68R139 68R140 68
J28 PJJ29 PJ
J30 PJ
A21A22A23A24A25A26A27
IRL0IRL1IRL2IRL3
CSX0CSX1CSX2CSX3CSX4CSX5
R38
68
A26 3A27 4A28 5A29 6A30 7A31 8
ASI0 9ASI1 10ASI2 11ASI3 12
CS0 13CS1 14CS2 15CS3 16CS4 17CS5 18
IRL0 29IRL1 30IRL2 31IRL3 32
AS 19RD/WR 20READY 27
SAMEPG 21TMR_OV 22
LOCK 23ERROR 24
MEXC 28BREQ 25
BGRNT 26XTAL1 34
CLKOUT1 35CLKOUT2 36
RESET 33
+5V 1+5V 2GND 37GND 38GND 39GND 40
CN7
CPU_BUS
J32 PJ
A26
CSX[0..5]
1 3
2J2
J/3
D0 5D1 7D2 9D3 11D4 13D5 15D6 17D7 19D8 21D9 23D10 25D11 27D12 29D13 31D14 33D15 35D16 6D17 8D18 10D19 12D20 14D21 16D22 18D23 20D24 22D25 24D26 26D27 28D28 30D29 32D30 34D31 36
A0 49A1 50A2 51A3 52A4 53A5 54A6 55A7 56A8 57A9 58A10 59A11 60A12 61A13 62A14 63A15 64A16 65A17 66A18 67A19 68A20 69A21 70A22 71A23 72
CSI0 39CSI1 40
CSO0 41CSO1 42
RD 43WR 44
BWE0 45BWE1 47BWE2 46BWE3 48
RD/BY 73RESET 74
VPP 75VPP 76
VCC 1VCC 2VCC 3VCC 4
VSS 37VSS 38VSS 77VSS 78VSS 79VSS 80
CN6
ROM_BUS
R107 68
CSX0
DR0DR1DR2
C7
0.1U
A0 12A1 11A2 10A3 9A4 8A5 7A6 6A7 5A8 27A9 26A10 23A11 25A12 4A13 28A14 29A15 3A16 2A17 30A18 31
D0 13D1 14D2 15D3 17D4 18D5 19D6 20D7 21
CE 22OE 24
VPP 1
VDD 32
GND 16
IC13
EPROM 4M*8/DIP
A0 12A1 11A2 10A3 9A4 8A5 7A6 6A7 5A8 27A9 26A10 23A11 25A12 4A13 28A14 29A15 3A16 2A17 30A18 31
D0 13D1 14D2 15D3 17D4 18D5 19D6 20D7 21
CE 22OE 24
VPP 1
VDD 32
GND 16
IC14
EPROM 4M*8/DIP
R7310K
A2A3A4A5A6A7A8A9A10A11A12A13A14A15A16A17A18A19
A2A3A4A5A6A7
DR0DR1DR2DR3DR4DR5DR6DR7
DR8DR9DR10DR11DR12DR13
A20
A0 16A1 17A2 18A3 19A4 22A5 23A6 24A7 25A8 26
RAS 14LCAS 29UCAS 28
WE 13OE 27
VCC 1VCC 6VCC 20
VSS 21VSS 35VSS 40
IO1 2IO2 3IO3 4IO4 5IO5 7IO6 8IO7 9IO8 10IO9 31IO10 32IO11 33IO12 34IO13 36IO14 37IO15 38IO16 39
NC 11NC 12NC 15NC 30
IC17
DRAM4M*16/SOJ
MA0MA1MA2MA3MA4MA5MA6MA7MA8
DR0DR1DR2DR3DR4DR5DR6DR7DR8DR9DR10DR11
C90.1U
1 3
2J26 J/3
1 3
2J27 J/3
C520.1U
MA0
MA9
C490.1U
C500.1U
C120.1U
C130.1U
C160.1U
A2A3A4A5A6A7A8A9
DR5DR6DR7DR8DR9DR10DR11DR12DR13DR14DR15DR16DR17DR18DR19DR20DR21DR22DR23DR24DR25DR26DR27DR28DR29DR30DR31
LED1
LED
LED2
LEDC41
0.1U
R67
330
R68
330
DT1FB1L3N
DT2FB1L3N
D 12
CP 11Q 9
Q 8
S
10
R
13
IC10B
74F74
D 2
CP 3Q 5
Q 6
S
4
R
1
IC10A
74F74
DB0
DB1
Yellow
Red
J16 PJ
R44 68R45 68
EPRDYXCPRDYX
PRRDYXPRINTX
ETBSYXCTBSYXSRCLKX
CMDXSTSX
TODXHSYNCX
VIDEOXRESETX
EnginController
DF11-20DP-2DSA
J5 PJ
J6 PJ
J7 PJ
J8 PJ
J9 PJJ10 PJ
J24J
R1
10K
SW2
PB
VCC 8
GND 5
CS 1SK 2DI 3DO 4ORG 6NC 7
IC11
AT93C46
C420.1U
R6647K
IC10-7IC10-14
C241U/50V
R7 68
R9 68
1 3 2 FL1
TH09502NAVCC 4
GND 2
OUT 3N.C. 1
CR1
67.15472MHz
C380.1U
R46
68
BL2
N2012Z121
J31 PJ
C230.1U
A0 17A1 18A2 19A3 20A4 23A5 24A6 25A7 26A8 27A9 28
RAS 14LCAS 31UCAS 30WE 13OE 29
VCC 1VCC 6VCC 21
VSS 22VSS 37VSS 42
IO1 2IO2 3IO3 4IO4 5IO5 7IO6 8IO7 9IO8 10IO9 33IO10 34IO11 35IO12 36IO13 38IO14 39IO15 40IO16 41
N.C. 11N.C. 12N.C. 15N.C. 16N.C. 32
IC19
DRAM16M*16/SOJ
A0 17A1 18A2 19A3 20A4 23A5 24A6 25A7 26A8 27A9 28
RAS 14LCAS 31UCAS 30WE 13OE 29
VCC 1VCC 6VCC 21
VSS 22VSS 37VSS 42
IO1 2IO2 3IO3 4IO4 5IO5 7IO6 8IO7 9IO8 10IO9 33IO10 34IO11 35IO12 36IO13 38IO14 39IO15 40IO16 41
N.C. 11N.C. 12N.C. 15N.C. 16N.C. 32
IC20
DRAM16M*16/SOJ
MA1MA2MA3
MA4MA5MA6MA7MA8
MA1MA2MA3
DR0DR1DR2DR3DR4DR5DR6DR7DR8DR9DR10DR11DR12DR13DR14DR15
DR16DR17DR18DR19DR20
MA0
C200.1U
C210.1U
A0 16A1 17A2 18A3 19A4 22A5 23A6 24A7 25A8 26
RAS 14LCAS 29UCAS 28
WE 13OE 27
VCC 1VCC 6VCC 20
VSS 21VSS 35VSS 40
IO1 2IO2 3IO3 4IO4 5IO5 7IO6 8IO7 9IO8 10IO9 31IO10 32IO11 33IO12 34IO13 36IO14 37IO15 38IO16 39
NC 11NC 12NC 15NC 30
IC18
DRAM4M*16/SOJ
MA0MA1MA2MA3MA4MA5MA6MA7MA8
DR12DR13DR14DR15
DR16DR17DR18DR19DR20DR21DR22DR23DR24DR25DR26DR27DR28DR29DR30DR31
C8
0.1U
A0 12A1 11A2 10A3 9A4 8A5 7A6 6A7 5A8 27A9 26A10 23A11 25A12 4A13 28A14 29A15 3A16 2A17 30A18 31
D0 13D1 14D2 15D3 17D4 18D5 19D6 20D7 21
CE 22OE 24
VPP 1
VDD 32
GND 16
IC15
EPROM 4M*8/DIP
A8A9A10A11A12A13A14A15A16A17A18A19
A2A3A4A5A6A7A8A9A10A11A12A13A14A15A16A17A18
DR14DR15
DR16DR17DR18DR19DR20DR21DR22DR23
A20
A2A3A4A5A6A7A8A9A10A11
DR3DR4DR5DR6DR7DR8DR9DR10DR11DR12DR13DR14DR15DR16DR17DR18DR19DR20DR21DR22DR23DR24DR25DR26DR27DR28DR29DR30DR31
A27
IRL0IRL1IRL2IRL3
CSX0CSX1CSX2CSX3CSX4CSX5
R75 68
R76 68
R77 68
R78 68
R79 68
R80 68
R81 68
R82 68
R83 68
R84 68
R85 68
R86 68
R87 68
R88 68
R89 68
R90 68
R91 68
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
DR0
DR1
DR2
DR3
DR4
DR5
DR6
DR7
DR8
DR9
DR10
DR11
DR12
DR13
DR14
DR15
KX15-40K2D
CSX0
A12A13A14A15A16A17A18A19A20A21
CSX1
A23A24A25
A22
C30
0.1U
C31
0.1U
A0 12A1 11A2 10A3 9A4 8A5 7A6 6A7 5A8 27A9 26A10 23A11 25A12 4A13 28A14 29A15 3A16 2A17 30A18 31
D0 13D1 14D2 15D3 17D4 18D5 19D6 20D7 21
CE 22OE 24
VPP 1
VDD 32
GND 16
IC16
EPROM 4M*8/DIP
A19
A2A3A4A5A6A7A8A9A10A11A12A13A14A15A16A17A18A19
DR24DR25DR26DR27DR28DR29DR30DR31
A20
A20
A0 10A1 9A2 8A3 7A4 6A5 5A6 4A7 3A8 41A9 40A10 39A11 38A12 37A13 36A14 35A15 34A16 33A17 2A18 1NC 42
CE 11OE 13BYTE 32
O0 14O1 16O2 18O3 20O4 23O5 25O6 27O7 29O8 15O9 17O10 19O11 21O12 24O13 26O14 28O15 30
VDD 22
GND 31GND 12
IC21
MROM8M*16
A0 10A1 9A2 8A3 7A4 6A5 5A6 4A7 3A8 41A9 40A10 39A11 38A12 37A13 36A14 35A15 34A16 33A17 2A18 1NC 42
CE 11OE 13BYTE 32
O0 14O1 16O2 18O3 20O4 23O5 25O6 27O7 29O8 15O9 17O10 19O11 21O12 24O13 26O14 28O15 30
VDD 22
GND 31GND 12
IC22
MROM8M*16
DR0DR1DR2DR3DR4DR5DR6DR7DR8DR9DR10DR11DR12DR13DR14DR15
DR16DR17DR18DR19DR20DR21DR22
A2A3A4A5A6A7A8A9A10A11A12A13A14A15A16A17A18A19
A2A3A4A5A6A7A8
A20A21
C22
0.1U
MA4MA5MA6MA7MA8
DR24DR25DR26DR27DR28DR29DR30DR31
DR21DR22DR23
J25,J26,J271-2 4M*16 / 2-3 16M*16
NOT USE C52 IN 16M*16.
NOT USE 21,22 PIN IN 4M*16.
R2
10SW1PB
R6
68
1
3
2C18
NFA41R00C470
VCC 7
C 5GND 4
OUT 6
NC 1NC 2NC 3NC 8
IC6
M51953BFP
R171K
C250.1U
1 3 2 FL2
TH09502NA
R33
68
D 12
CP 11Q 9
Q 8
S
10
R
13
IC8B
74F74
C390.1U
BL1 2012Z601
C460.1U
+5 14
GND 7
IC8
VCC_GND
VCC 4
GND 2
OUT 3N.C. 1
CR2
45.0000MHz
Patern Only
C1
1U/50V
R1010K
R3210K
R7210K
VCC 57VCC 58VCC 59VCC 60
GND 41GND 42GND 43GND 44
RESET 45INH 46CMREQ 47WRRDY 48RDREQ 49WRT 50RDT 51TYPB 52
TXD 53READY 54RXD 55
NC 56
DB0 7DB1 8DB2 9DB3 10DB4 11DB5 12DB6 13DB7 14
AB0 15AB1 16AB2 17AB3 18AB4 19
CS 20RD 21WR 22
NMI 24IREQ 23DREQ 25PCLK 1DTCT 26RST 2
TXD+ 31TXD- 32RXD+ 33RXD- 34DTR 35CTS 36
NC 37NC 38LCD 39SWRD 40
VCC 27VCC 28VCC 29VCC 30
GND 3GND 4GND 5GND 6
CN4
IOBUS/OPTIF
R50 3.3KR51 3.3KR52 3.3K
DB0DB1DB2DB3DB4DB5DB6DB7
AB0AB1AB2AB3AB4
CUT THE FOLLOWS LINES IN MP BOARD.
*
J28,29,30,31,32 ARE "CUT LAND PATTERN".
DR24DR25DR26DR27DR28DR29DR30DR31
DR23A9A10A11A12A13A14A15A16A17A18A19A20A21
52819-0801
R92 68
R93 68
R94 68
R95 68
R96 68
R97 68
R98 68
R99 68
R100 68
R101 68
R102 68
R103 68
R104 68
R105 68
R106 68
D16
D17
D18
D19
D20
D21
D22
D23
D24
D25
D26
D27
D28
D29
D30
D31
DR16
DR17
DR18
DR19
DR20
DR21
DR22
DR23
DR24
DR25
DR26
DR27
DR28
DR29
DR30
DR31
DR[0..31]
CSX2CSX3
D0
2
D1
4
D2
6
D3
8
D4
20
D5
22
D6
24
D7
26
D8
49
D9
51
D10
53
D11
55
D12
57
D13
61
D14
63
D15
65
D16
3
D17
5
D18
7
D19
9
D20
21
D21
23
D22
25
D23
27
D24
50
D25
52
D26
54
D27
56
D28
58
D29
60
D30
62
D31
64
A0
12
A1
13
A2
14
A3
15
A4
16
A5
17
A6
18
A7
28
A8
31
A9
32
A10
19
A11
40
A12
43
A13
41
A14
42
A15
71
A16
66
A17
48
A18
46
A19
29
A20
33
A21
36
A22
37
A23
38
CS0
44
CS1
45
EEP
34
RD
11
WR
47
RESET
35
VCC
10
VCC
30
VCC
59
VSS
1
VSS
39
VSS
72
R/B
67
NC
68
NC
69
NC
70
CN5ROM_SIMM
A19
A20
A21
A22
A23
A24
A25
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
DR0
DR1
DR2
DR3
DR4
DR5
DR6
DR7
DR8
DR9
DR10
DR11
DR12
DR13
DR14
DR15
DR16
DR17
DR18
DR19
DR20
DR21
DR22
DR23
DR24
DR25
DR26
DR27
DR28
DR29
DR30
DR31
1. IC1---126,127,129,116 PIN2. IC3---49 PIN
Figure A-3. C169 MAIN-B Circuit Diagram (1/2)
EPL-5500 Service Manual Appendix
Rev. A A-11
TO
DX
VID
EO
XH
SY
NC
X
R2
12
2.2
KR
20
82
.2K
1
2
3
4
8
7
6
5
RM
20
13
.3K
R2
11
10K
P5
4/C
NT
R0
15
P7
2/S
CL
K2
9
P5
3/IN
T4
16
P7
1/S
OU
T2
10
P70
/SIN
2 1
1
P00
56
P86
/RT
P4
66
P5
6/D
A1
13
P5
7/D
A2
12
P60
/AN
5
3
P81
/DA
4 7
1
P76
/AN
3
5
P04
52
P7
5/A
N2
6
P6
3/A
N9
/AM
P+
78
P6
4/A
N1
0/A
MP
- 7
7
P3
7 5
7
P77
/AN
4
4
AM
PO
UT
79
P02
54
XIN
30
XO
UT
31
P8
2/R
TP
0 7
0
P8
3/R
TP
1 6
9
P8
4/R
TP
2 6
8
P8
5/R
TP
3 6
7
P0
1 5
5
P0
3 5
3
P0
7 4
9
P2
2 3
8
P2
4 3
6
P3
6 5
8
P4
0 2
9
P4
1 2
8
P4
3/IN
T1
24
P4
7/S
RD
71
20
P5
0/T
OU
T 1
9
P5
1/I
NT
2 1
8
P5
2/I
NT
3 1
7
P6
2/A
N7
1
P8
7/R
TP
5 6
5
P3
36
1
P3
0/R
TP
66
4
P3
1/R
TP
76
3
P3
26
2
P4
2/IN
T0
25
P2
04
0
P21
39
P23
37
P4
6/S
CL
K1
21
P45
/TX
D2
2
P44
/RX
D2
3
RE
SE
T2
7
P1
54
3
P3
46
0
P1
64
2
P1
44
4
P13
45
P10
48
P1
14
7
P1
24
6
P3
55
9
P25
35
P26
34
P27
33
P80
/DA
37
2
P73
8
P0
55
1
P0
65
0
P5
5/C
NT
R1
14
P6
1/A
N6
2
P7
4 7
P1
74
1
VC
C7
3
AM
PV
CC
80
AD
VR
EF
74
P6
5/A
N1
1/D
AV
RE
F7
6
VS
S3
2
AV
SS
75
CN
AV
SS
26
IC2
01
M3
80
7X
R2
072
.2K
C2
39
0.0
1U
+5
V 7
SS
CA
N 1
LD
AT
A 6
LD
AP
C1
4
LD
AP
C2
3
LD
_C
TL
2
GN
D1
5
CN
20
5
11
12
13
IC2
02D
74
HC
02
R2
06
33
R2
54
1K
R2
53
68
0
C2
53
47
00
P
C2
58
0.1
U
8 9 1
0
IC2
02C
74
HC
02
C2
52
10
00
P
R2
96
10
K
R2
91
10
K
TP
20
4T
P
VC
C 7
C 5
GN
D 4
OU
T
6
NC
1
NC
2
NC
3
NC
8
IC2
51
M5
19
53A
FP
C2
57
0.1
UC
20
7
10
P
EP
RD
YX
PR
RD
YX
ET
BS
YX
SR
CL
KX
STS
XC
MD
X
CT
BS
YX
CP
RD
YX
RE
SE
TX
PR
INT
X
PS
3
1
PS
3
3
GN
D
2
CN
20
8
+2
4V
5
NC
4
PS
1
1
PS
1
3
FE
ED
1
6
GN
D1
2
CN
20
3
C2
40
0.0
1U
1
16
IC2
03
A
ULN
20
03
A
R2
13
22
0 1
/4W
R21
42
20
1/4
W
R21
6
47
K
R2
15
47K
C2
55
0.0
1U
C2
56
0.0
1U
C2
54
0.0
1U
40
0m
A
C2
51
10
00
P
1 3 2
VR
20
11
0K
R21
03
.0K
R2
09
1.0
K
C23
81
00
0P
C23
71
00
0P
C23
61
00
0P
C23
51
00
0P
C2
32
10
00
PC
231
10
00P
C2
30
10
00
P
C22
91
00
0P
C2
59
0.1
U
C2
43
0.1
U
PL
AC
E N
EA
R C
N2
05
PL
AC
E N
EA
R C
N21
0
NC
1
+2
4V
2
+5
V 4
P_
CT
L 5
GN
D2
3
CN
21
0
+5
V 2
TH
1
CN
20
2
TP
202
TP
+2
4V
2
FA
N 1
CN
21
1
C20
6
10
00P
R2
27
6.8
1/4
W
20
0m
A
R20
3
3.0
K 1
.0%
C2
14
10
00
P
DT
20
1
FB
1L
3N
R2
26
47
KR
29
5
10
K
C21
60
.01
U
1
2 3
4
8
7
6
5
RM
20
24
.7K
R23
34
.7K
R23
44
.7K
R2
364
7K
+2
4V
1
+5
V
4
NC
3
PE
2
6
PS
IZ0
7
PS
IZ1
8
PS
IZ2
9
FE
ED
2
2
CH
EC
K1
10
CH
EC
K2
11
CH
EC
K3
12
GN
D1
5
CN
209
C2
41
0.0
1U
C2
271
00
0P
C2
26
100
0P
C2
251
00
0P
7
10
IC2
03
G
UL
N20
03
A
2
15
IC20
3B
UL
N2
00
3A
5
12
IC20
3E
UL
N2
00
3A
3
14
IC20
3C
UL
N2
00
3A
C2
19
10
00
P
C2
20
10
00
P4
00
mA
C2
17
10
00
P
C2
18
10
00
P
C2
05
22P
CR
20
18
MH
z
C2
04
22
P
2 3
1
IC2
02
A
74
HC
02
5 6
4
IC2
02
B
74
HC
02
R2
93
10K
IC2
02-
14
4 1
3
IC2
03
D
UL
N20
03
A
C2
03
0.1
U
TP
20
3
TP
TP
20
1
TP
IC2
02-
7
C2
01
220
U/1
6V
FU
SE
R 5
+2
4V
1
GN
D2
2
+5
V 4
GN
D1
3
CN
207
A 1
A 2
B 3
B 4
CN
206
1A
R2
19
1K
R2
17
56
K
C2
108
20
P
C2
08
82
0P
R2
24
2.7
1/4
W
R2
21
1 1
/2W
1A
MA
15
MB
1
E 1
6
C 1
0
T
2
PH
8
I0 9
I1 7
VM
M 3
VM
M1
4
VC
C 6
VC
C1
1
GN
D 4
GN
D 5
GN
D1
2
GN
D1
3
IC2
04
TE
A37
18
SD
P
R2
92
10
K
1A
R2
38
10
KR
23
71
0K
R2
04
39
K
R20
56
.8K
TP
20
5T
P
R2
90
10
K
C21
5
0.1
U
6
11
IC2
03
F
ULN
20
03
AD
201
1S
S2
26
R22
3
10
0K
C2
13
0.0
22U
GN
D
8
NC
9
IC2
03
20
03X
C2
33
10
00
P
C22
41
00
0P
C22
31
000
P
C22
21
00
0P
C2
21
10
00
P
C23
4
10
00P
C2
281
00
0P
C2
42
0.1
U
HV
_S
2
4
+2
4V
8
HV
_C
1
HV
_S
3
HV
_T
2
HV
_B
5
BIA
S_
M
6
GN
D2
7
CN
20
4
C20
20
.1U
MA
15
MB
1
E 1
6
C 1
0
T
2
PH
8
I0 9
I1 7
VM
M 3
VM
M1
4
VC
C 6
VC
C1
1
GN
D 4
GN
D 5
GN
D1
2
GN
D1
3
IC2
05
TE
A3
71
8S
DP
C2
124
7U
35
V
1A
R2
201
K
R21
85
6K
C2
11
820
P
C2
09
820
P
R2
25
2.7
1/4
W
R2
22
1 1
/2W
1A
Figure A-4. C169 MAIN-B Circuit Diagram (2/2)
EPL-5500 Service Manual Appendix
Rev. A A-13
LN
F16.3A, 125V
R1
470K
C1
0.22uF125V
NR
1E
NC
271D
-10
Z7D
271
L1Z0408, Z0462
C3
C4
C3
, C4
2200pF
125V
C2
0.1uF
125V
BD
1D
258A50
D2S
860
Th1100-g,M
100 10C,
M10007C
NTH
9D100LA
C19
0.01u250V
R24
100K0.5W
D4
EU
2A, A
GIC
ER
A22-06
R4
220K-180K
0.25W
R5
390K
0.25W
Q1
2SK
1445
2SK
1446
R7
4.7
C5
2200pF125V
+
C5
330u
F2
00V
C8
680p
1kV
500V
R5
222W
L10
ZD
2H
ZS
15
R11
68K
Q2
D1207
C1213
C1815
PC
1P
C81
7
C9
0.0
1uF5
0V
R8
6800.5W
R9
10K
ZD1
HZS
18-20
R10
22K
R25
18K
C10
4700p
F50
V
T1
Z04
96
D2
YG
901C2
D5LC
20U
D3
YG
801C4
D5S
C4M
FMB
-24M
+C
173300uF10V
++
C15
1000uF35V
C1
6100
0uF35V
R27
1.2K0.5W
R19
1.2K0.5W
R20
1.2K0.5W
R26
1.2K0.5W
L9
L7Z0
400
SC
R1
TF3215
2P4M
ZD4
HZS
27Z
D3
HZ
S6
R29
33R
3033C
21 1uF, 50V
R22
1000.5W
34 2 15
SW
2A
M51662A
531
CN
1
+24V
+24V G
ND
+5V G
ND
+5.1V
H.L
R12
1K0.25W
R21
0.25W
PC
2S
21M
D4
VS
21M
E4F
D1
ER
AG
1-21
1S
S8
1R
283
3
R12
1.2K
C14
0.0
47uF
50V
R1
433
0
PC
1P
C917
IC1
L5431TL431uP
C1093
HA
17431
C1
30.1uF50V
R1
547K
VR
11K
R15
1.8K
C7
0.1uF125
VL11
Z0
068
TRC
TM8415
SM
8GZ47
R2
4.7R3
33
13
CN
353259-0320
NL
Figure A-5. PWB-E (120 V) Circuit Diagram
Appendix EPL-5500 Service Manual
A-14 Rev. A
+
5
1 2 3
N.
HE
AT
ER
36
0W
L.
1 2 3
N.
HE
AT
ER
36
0W
L.
CN
2
INL1
SW
1W
H1
WH
2
F1
25
0V
5A
C1
25
0V
0.3
3u
F
VS
14
70V
L1
CM
102
L2
CM
102
R1
1/4
W4
70
K
R2
1/4
W4
70
K
C2
250
V2
200
pF
C3
250
V2
200
pF
C4
25
0V
0.1
uF
RC
16
00V
, 1.5
AR
T1
10
C7
40
0V8
2uF
RC
51
20
0V
10
A
RC
512
00V
10
A
+
+
- +
1 2 4 3
ZC
VS
24
70
V
C2
12
50
V0
.1u
F
TH
16
00V
5A
C2
20
.01
uF
R2
11
/2W
1K
R2
21
/2W
33
PI6
1
61
42
R6
91
W1
.2K
CN
1
FU
SE
R L
AM
P
+2
4V
GN
D(+
24
V)
+5
.1V
GN
D(+
5.1
V)
R3
1/2
W4
70
K
R4
1/2
W4
70K
C9
1K
V1
00p
F
R6
2W
10
0
Q1
80
0V
3A
R1
24
.7K
1/4
W
R5
3W
10
0K
D1
800
1A
C8
63
0V
0.0
1u
F
T1
TM
19
9
D2
70V
0.1
5A
C1
00
.03
3u
F
Q2
50
V2
A
VR
12
00
C1
10
.04
7uF
R7
2W
16
R8
2W
16
R9
2W
16
R10
39
0
D3
2.0
-2.2
V
R1
11
00
D4
70
V0
.15
A
+
+
C62
35
V2
20
0u
FR
632
W1
.2K
R6
42
W1
.2K
SW
61
L62
CL
086
C6
41
0V
22
00
uF
+
C65
50
V1
0u
F
R7
3W
IRE
, PE
S
R6
63
W3
3
PI5
1
5 4
1 2
M5
1
R51
100
R5
21
K
C51
4.7
uF
R6
31
.58
K1
%
R5
41
.47
K1
%
D62
28
.2-
29
.6V
D6
14
.7-
4.9
V
D6
37
0V
0.1
5A
D64
70
V0
.15
A
TH
61
40
0V
5A
C6
14
.7u
F
R6
24
7
R6
11
K
R7
02
21
/4WD
651
9.5
-20
.4V
M6
1
7
8
4
6 5
C66
0.1
uF
R71
10
0
R7
23
.9K
Figure A-6. PWB-E (220/240 V) Circuit Diagram
EPL-5500 Service Manual Appendix
Rev. A A-15
A.3 CIRCUIT BOARD COMPONENT LAYOUT
Figure A-7. C169 MAIN-B Component Layout (Front)
Appendix EPL-5500 Service Manual
A-16 Rev. A
Figure A-8. C169 MAIN-B Component Layout (Rear)
EPL-5500 Service Manual Appendix
Rev. A A-17
EPSON OVERSEAS MARKETING LOCATIONS
EPSON AMERICA, INC EPSON DEUTCHLAND GmBH20770 Madrona Avenue, Zülipicher Straße 6, 40549 DüsseldorfP.O. Box 2842 GermanyTorrance, CA 90509-2842 Phone: 0211-56030Phone: (800) 922-8911 Fax: 0211-504-7787Fax: (310) 782-5220
EPSON UK LTD. EPSON FRANCE S.A.Campus 100, Maylands Avenue, 68 bis, rue Marjolin 92300,Hemel Hempstead, Herts, Levallois-Perret, FranceHP2 7TJ, U.K. Phone: 02-262331Phone: 1442-61144 Fax: 02-2440750Fax: 1442-227227
EPSON IBERICA EPSON ITALIA S.p.A.Avda. de Roma, 18-26 V. le F. lli Casiraghi, 42708290 Cerdanyola del Valles 20099 Sesto S. Giovanni MI, ItalyBarcelona, Spain Phone: 02-262331Phone: 582.15.00 Fax: 02-2440750Fax: 582.15.55
EPSON AUSTRALIA PTY. LTD. EPSON (SINGAPORE) PTE, LTD.1/70 Gibbes Street, No. 1 Raffles Place #26-00Chatswood 2067 NSW, Australia OUB Centre, Singapore 0104Phone: 02-415-9000 Phone: 5330477Fax: 02-417-0077 Fax: 5338119
EPSON HONG KONG LTD. EPSON TAIWAN TECHNOLOGY &20/F, Harbour Centre, TRADING LTD.25 Harbour Road, Wanchai, 10F, No.287 Nonking E. Road, Sec . 3,Hong Kong Taipei, Taiwan, R.O.C.Phone: 585-4600 Phone: 2-717-7360Fax: 827-4346 Fax: 2-712-9164
SEIKOPRINTER80 Harashinden, Hirooka Shiojiri-shi,Nagano-ken, 399-07, JAPANPhone: 0263-52-2552Fax: 0263-54-4007Telex: 3342-214 (SEPSON J)
As of October 1995
EPSON